foo.cc:3:6: error: stray '\302' in program
 using namespace std;
      ^
foo.cc:3:7: error: stray '\240' in program
 using namespace std;
       ^
foo.cc:3:17: error: stray '\302' in program
 using namespace std;
                 ^
foo.cc:3:18: error: stray '\240' in program
 using namespace std;
                  ^
foo.cc:5:4: error: stray '\302' in program
 int i,j,n,m,a,b,c,sum,ans;
    ^
foo.cc:5:5: error: stray '\240' in program
 int i,j,n,m,a,b,c,sum,ans;
     ^
foo.cc:7:4: error: stray '\302' in program
 int s[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
    ^
foo.cc:7:5: error: stray '\240' in program
 int s[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
     ^
foo.cc:9:4: error: stray '\302' in program
 int main()
    ^
foo.cc:9:5: error: stray '\240' in program
 int main()
     ^
foo.cc:13:1: error: stray '\302' in program
     scanf("%d%d",&n,&m);
 ^
foo.cc:13:2: error: stray '\240' in program
     scanf("%d%d",&n,&m);
  ^
foo.cc:13:3: error: stray '\302' in program
     scanf("%d%d",&n,&m);
   ^
foo.cc:13:4: error: stray '\240' in program
     scanf("%d%d",&n,&m);
    ^
foo.cc:13:5: error: stray '\302' in program
     scanf("%d%d",&n,&m);
     ^
foo.cc:13:6: error: stray '\240' in program
     scanf("%d%d",&n,&m);
      ^
foo.cc:13:7: error: stray '\302' in program
     scanf("%d%d",&n,&m);
       ^
foo.cc:13:8: error: stray '\240' in program
     scanf("%d%d",&n,&m);
        ^
foo.cc:15:1: error: stray '\302' in program
     for (i=1;i<=12;i++)//枚举月和日
 ^
foo.cc:15:2: error: stray '\240' in program
     for (i=1;i<=12;i++)//枚举月和日
  ^
foo.cc:15:3: error: stray '\302' in program
     for (i=1;i<=12;i++)//枚举月和日
   ^
foo.cc:15:4: error: stray '\240' in program
     for (i=1;i<=12;i++)//枚举月和日
    ^
foo.cc:15:5: error: stray '\302' in program
     for (i=1;i<=12;i++)//枚举月和日
     ^
foo.cc:15:6: error: stray '\240' in program
     for (i=1;i<=12;i++)//枚举月和日
      ^
foo.cc:15:7: error: stray '\302' in program
     for (i=1;i<=12;i++)//枚举月和日
       ^
foo.cc:15:8: error: stray '\240' in program
     for (i=1;i<=12;i++)//枚举月和日
        ^
foo.cc:15:12: error: stray '\302' in program
     for (i=1;i<=12;i++)//枚举月和日
            ^
foo.cc:15:13: error: stray '\240' in program
     for (i=1;i<=12;i++)//枚举月和日
             ^
foo.cc:17:1: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
 ^
foo.cc:17:2: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
  ^
foo.cc:17:3: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
   ^
foo.cc:17:4: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
    ^
foo.cc:17:5: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
     ^
foo.cc:17:6: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
      ^
foo.cc:17:7: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
       ^
foo.cc:17:8: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
        ^
foo.cc:17:9: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
         ^
foo.cc:17:10: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
          ^
foo.cc:17:11: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
           ^
foo.cc:17:12: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
            ^
foo.cc:17:13: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
             ^
foo.cc:17:14: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
              ^
foo.cc:17:15: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
               ^
foo.cc:17:16: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
                ^
foo.cc:17:20: error: stray '\302' in program
         for (j=1;j<=s[i];j++)
                    ^
foo.cc:17:21: error: stray '\240' in program
         for (j=1;j<=s[i];j++)
                     ^
foo.cc:19:1: error: stray '\302' in program
         {
 ^
foo.cc:19:2: error: stray '\240' in program
         {
  ^
foo.cc:19:3: error: stray '\302' in program
         {
   ^
foo.cc:19:4: error: stray '\240' in program
         {
    ^
foo.cc:19:5: error: stray '\302' in program
         {
     ^
foo.cc:19:6: error: stray '\240' in program
         {
      ^
foo.cc:19:7: error: stray '\302' in program
         {
       ^
foo.cc:19:8: error: stray '\240' in program
         {
        ^
foo.cc:19:9: error: stray '\302' in program
         {
         ^
foo.cc:19:10: error: stray '\240' in program
         {
          ^
foo.cc:19:11: error: stray '\302' in program
         {
           ^
foo.cc:19:12: error: stray '\240' in program
         {
            ^
foo.cc:19:13: error: stray '\302' in program
         {
             ^
foo.cc:19:14: error: stray '\240' in program
         {
              ^
foo.cc:19:15: error: stray '\302' in program
         {
               ^
foo.cc:19:16: error: stray '\240' in program
         {
                ^
foo.cc:21:1: error: stray '\302' in program
             c=(j%10)*1000+
 ^
foo.cc:21:2: error: stray '\240' in program
             c=(j%10)*1000+
  ^
foo.cc:21:3: error: stray '\302' in program
             c=(j%10)*1000+
   ^
foo.cc:21:4: error: stray '\240' in program
             c=(j%10)*1000+
    ^
foo.cc:21:5: error: stray '\302' in program
             c=(j%10)*1000+
     ^
foo.cc:21:6: error: stray '\240' in program
             c=(j%10)*1000+
      ^
foo.cc:21:7: error: stray '\302' in program
             c=(j%10)*1000+
       ^
foo.cc:21:8: error: stray '\240' in program
             c=(j%10)*1000+
        ^
foo.cc:21:9: error: stray '\302' in program
             c=(j%10)*1000+
         ^
foo.cc:21:10: error: stray '\240' in program
             c=(j%10)*1000+
          ^
foo.cc:21:11: error: stray '\302' in program
             c=(j%10)*1000+
           ^
foo.cc:21:12: error: stray '\240' in program
             c=(j%10)*1000+
            ^
foo.cc:21:13: error: stray '\302' in program
             c=(j%10)*1000+
             ^
foo.cc:21:14: error: stray '\240' in program
             c=(j%10)*1000+
              ^
foo.cc:21:15: error: stray '\302' in program
             c=(j%10)*1000+
               ^
foo.cc:21:16: error: stray '\240' in program
             c=(j%10)*1000+
                ^
foo.cc:21:17: error: stray '\302' in program
             c=(j%10)*1000+
                 ^
foo.cc:21:18: error: stray '\240' in program
             c=(j%10)*1000+
                  ^
foo.cc:21:19: error: stray '\302' in program
             c=(j%10)*1000+
                   ^
foo.cc:21:20: error: stray '\240' in program
             c=(j%10)*1000+
                    ^
foo.cc:21:21: error: stray '\302' in program
             c=(j%10)*1000+
                     ^
foo.cc:21:22: error: stray '\240' in program
             c=(j%10)*1000+
                      ^
foo.cc:21:23: error: stray '\302' in program
             c=(j%10)*1000+
                       ^
foo.cc:21:24: error: stray '\240' in program
             c=(j%10)*1000+
                        ^
foo.cc:23:1: error: stray '\302' in program
               (j/10)*100+
 ^
foo.cc:23:2: error: stray '\240' in program
               (j/10)*100+
  ^
foo.cc:23:3: error: stray '\302' in program
               (j/10)*100+
   ^
foo.cc:23:4: error: stray '\240' in program
               (j/10)*100+
    ^
foo.cc:23:5: error: stray '\302' in program
               (j/10)*100+
     ^
foo.cc:23:6: error: stray '\240' in program
               (j/10)*100+
      ^
foo.cc:23:7: error: stray '\302' in program
               (j/10)*100+
       ^
foo.cc:23:8: error: stray '\240' in program
               (j/10)*100+
        ^
foo.cc:23:9: error: stray '\302' in program
               (j/10)*100+
         ^
foo.cc:23:10: error: stray '\240' in program
               (j/10)*100+
          ^
foo.cc:23:11: error: stray '\302' in program
               (j/10)*100+
           ^
foo.cc:23:12: error: stray '\240' in program
               (j/10)*100+
            ^
foo.cc:23:13: error: stray '\302' in program
               (j/10)*100+
             ^
foo.cc:23:14: error: stray '\240' in program
               (j/10)*100+
              ^
foo.cc:23:15: error: stray '\302' in program
               (j/10)*100+
               ^
foo.cc:23:16: error: stray '\240' in program
               (j/10)*100+
                ^
foo.cc:23:17: error: stray '\302' in program
               (j/10)*100+
                 ^
foo.cc:23:18: error: stray '\240' in program
               (j/10)*100+
                  ^
foo.cc:23:19: error: stray '\302' in program
               (j/10)*100+
                   ^
foo.cc:23:20: error: stray '\240' in program
               (j/10)*100+
                    ^
foo.cc:23:21: error: stray '\302' in program
               (j/10)*100+
                     ^
foo.cc:23:22: error: stray '\240' in program
               (j/10)*100+
                      ^
foo.cc:23:23: error: stray '\302' in program
               (j/10)*100+
                       ^
foo.cc:23:24: error: stray '\240' in program
               (j/10)*100+
                        ^
foo.cc:23:25: error: stray '\302' in program
               (j/10)*100+
                         ^
foo.cc:23:26: error: stray '\240' in program
               (j/10)*100+
                          ^
foo.cc:23:27: error: stray '\302' in program
               (j/10)*100+
                           ^
foo.cc:23:28: error: stray '\240' in program
               (j/10)*100+
                            ^
foo.cc:25:1: error: stray '\302' in program
               (i%10)*10+
 ^
foo.cc:25:2: error: stray '\240' in program
               (i%10)*10+
  ^
foo.cc:25:3: error: stray '\302' in program
               (i%10)*10+
   ^
foo.cc:25:4: error: stray '\240' in program
               (i%10)*10+
    ^
foo.cc:25:5: error: stray '\302' in program
               (i%10)*10+
     ^
foo.cc:25:6: error: stray '\240' in program
               (i%10)*10+
      ^
foo.cc:25:7: error: stray '\302' in program
               (i%10)*10+
       ^
foo.cc:25:8: error: stray '\240' in program
               (i%10)*10+
        ^
foo.cc:25:9: error: stray '\302' in program
               (i%10)*10+
         ^
foo.cc:25:10: error: stray '\240' in program
               (i%10)*10+
          ^
foo.cc:25:11: error: stray '\302' in program
               (i%10)*10+
           ^
foo.cc:25:12: error: stray '\240' in program
               (i%10)*10+
            ^
foo.cc:25:13: error: stray '\302' in program
               (i%10)*10+
             ^
foo.cc:25:14: error: stray '\240' in program
               (i%10)*10+
              ^
foo.cc:25:15: error: stray '\302' in program
               (i%10)*10+
               ^
foo.cc:25:16: error: stray '\240' in program
               (i%10)*10+
                ^
foo.cc:25:17: error: stray '\302' in program
               (i%10)*10+
                 ^
foo.cc:25:18: error: stray '\240' in program
               (i%10)*10+
                  ^
foo.cc:25:19: error: stray '\302' in program
               (i%10)*10+
                   ^
foo.cc:25:20: error: stray '\240' in program
               (i%10)*10+
                    ^
foo.cc:25:21: error: stray '\302' in program
               (i%10)*10+
                     ^
foo.cc:25:22: error: stray '\240' in program
               (i%10)*10+
                      ^
foo.cc:25:23: error: stray '\302' in program
               (i%10)*10+
                       ^
foo.cc:25:24: error: stray '\240' in program
               (i%10)*10+
                        ^
foo.cc:25:25: error: stray '\302' in program
               (i%10)*10+
                         ^
foo.cc:25:26: error: stray '\240' in program
               (i%10)*10+
                          ^
foo.cc:25:27: error: stray '\302' in program
               (i%10)*10+
                           ^
foo.cc:25:28: error: stray '\240' in program
               (i%10)*10+
                            ^
foo.cc:27:1: error: stray '\302' in program
               (i/10);//算出前四位。
 ^
foo.cc:27:2: error: stray '\240' in program
               (i/10);//算出前四位。
  ^
foo.cc:27:3: error: stray '\302' in program
               (i/10);//算出前四位。
   ^
foo.cc:27:4: error: stray '\240' in program
               (i/10);//算出前四位。
    ^
foo.cc:27:5: error: stray '\302' in program
               (i/10);//算出前四位。
     ^
foo.cc:27:6: error: stray '\240' in program
               (i/10);//算出前四位。
      ^
foo.cc:27:7: error: stray '\302' in program
               (i/10);//算出前四位。
       ^
foo.cc:27:8: error: stray '\240' in program
               (i/10);//算出前四位。
        ^
foo.cc:27:9: error: stray '\302' in program
               (i/10);//算出前四位。
         ^
foo.cc:27:10: error: stray '\240' in program
               (i/10);//算出前四位。
          ^
foo.cc:27:11: error: stray '\302' in program
               (i/10);//算出前四位。
           ^
foo.cc:27:12: error: stray '\240' in program
               (i/10);//算出前四位。
            ^
foo.cc:27:13: error: stray '\302' in program
               (i/10);//算出前四位。
             ^
foo.cc:27:14: error: stray '\240' in program
               (i/10);//算出前四位。
              ^
foo.cc:27:15: error: stray '\302' in program
               (i/10);//算出前四位。
               ^
foo.cc:27:16: error: stray '\240' in program
               (i/10);//算出前四位。
                ^
foo.cc:27:17: error: stray '\302' in program
               (i/10);//算出前四位。
                 ^
foo.cc:27:18: error: stray '\240' in program
               (i/10);//算出前四位。
                  ^
foo.cc:27:19: error: stray '\302' in program
               (i/10);//算出前四位。
                   ^
foo.cc:27:20: error: stray '\240' in program
               (i/10);//算出前四位。
                    ^
foo.cc:27:21: error: stray '\302' in program
               (i/10);//算出前四位。
                     ^
foo.cc:27:22: error: stray '\240' in program
               (i/10);//算出前四位。
                      ^
foo.cc:27:23: error: stray '\302' in program
               (i/10);//算出前四位。
                       ^
foo.cc:27:24: error: stray '\240' in program
               (i/10);//算出前四位。
                        ^
foo.cc:27:25: error: stray '\302' in program
               (i/10);//算出前四位。
                         ^
foo.cc:27:26: error: stray '\240' in program
               (i/10);//算出前四位。
                          ^
foo.cc:27:27: error: stray '\302' in program
               (i/10);//算出前四位。
                           ^
foo.cc:27:28: error: stray '\240' in program
               (i/10);//算出前四位。
                            ^
foo.cc:29:1: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
 ^
foo.cc:29:2: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
  ^
foo.cc:29:3: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
   ^
foo.cc:29:4: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
    ^
foo.cc:29:5: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
     ^
foo.cc:29:6: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
      ^
foo.cc:29:7: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
       ^
foo.cc:29:8: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
        ^
foo.cc:29:9: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
         ^
foo.cc:29:10: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
          ^
foo.cc:29:11: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
           ^
foo.cc:29:12: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
            ^
foo.cc:29:13: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
             ^
foo.cc:29:14: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
              ^
foo.cc:29:15: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
               ^
foo.cc:29:16: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
                ^
foo.cc:29:17: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
                 ^
foo.cc:29:18: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
                  ^
foo.cc:29:19: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
                   ^
foo.cc:29:20: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
                    ^
foo.cc:29:21: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
                     ^
foo.cc:29:22: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
                      ^
foo.cc:29:23: error: stray '\302' in program
             sum=c*10000+i*100+j;//算出整个日期
                       ^
foo.cc:29:24: error: stray '\240' in program
             sum=c*10000+i*100+j;//算出整个日期
                        ^
foo.cc:31:1: error: stray '\302' in program
             if (sum<n||sum>m) continue;
 ^
foo.cc:31:2: error: stray '\240' in program
             if (sum<n||sum>m) continue;
  ^
foo.cc:31:3: error: stray '\302' in program
             if (sum<n||sum>m) continue;
   ^
foo.cc:31:4: error: stray '\240' in program
             if (sum<n||sum>m) continue;
    ^
foo.cc:31:5: error: stray '\302' in program
             if (sum<n||sum>m) continue;
     ^
foo.cc:31:6: error: stray '\240' in program
             if (sum<n||sum>m) continue;
      ^
foo.cc:31:7: error: stray '\302' in program
             if (sum<n||sum>m) continue;
       ^
foo.cc:31:8: error: stray '\240' in program
             if (sum<n||sum>m) continue;
        ^
foo.cc:31:9: error: stray '\302' in program
             if (sum<n||sum>m) continue;
         ^
foo.cc:31:10: error: stray '\240' in program
             if (sum<n||sum>m) continue;
          ^
foo.cc:31:11: error: stray '\302' in program
             if (sum<n||sum>m) continue;
           ^
foo.cc:31:12: error: stray '\240' in program
             if (sum<n||sum>m) continue;
            ^
foo.cc:31:13: error: stray '\302' in program
             if (sum<n||sum>m) continue;
             ^
foo.cc:31:14: error: stray '\240' in program
             if (sum<n||sum>m) continue;
              ^
foo.cc:31:15: error: stray '\302' in program
             if (sum<n||sum>m) continue;
               ^
foo.cc:31:16: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                ^
foo.cc:31:17: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                 ^
foo.cc:31:18: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                  ^
foo.cc:31:19: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                   ^
foo.cc:31:20: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                    ^
foo.cc:31:21: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                     ^
foo.cc:31:22: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                      ^
foo.cc:31:23: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                       ^
foo.cc:31:24: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                        ^
foo.cc:31:27: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                           ^
foo.cc:31:28: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                            ^
foo.cc:31:43: error: stray '\302' in program
             if (sum<n||sum>m) continue;
                                           ^
foo.cc:31:44: error: stray '\240' in program
             if (sum<n||sum>m) continue;
                                            ^
foo.cc:33:1: error: stray '\302' in program
             ans++;//统计
 ^
foo.cc:33:2: error: stray '\240' in program
             ans++;//统计
  ^
foo.cc:33:3: error: stray '\302' in program
             ans++;//统计
   ^
foo.cc:33:4: error: stray '\240' in program
             ans++;//统计
    ^
foo.cc:33:5: error: stray '\302' in program
             ans++;//统计
     ^
foo.cc:33:6: error: stray '\240' in program
             ans++;//统计
      ^
foo.cc:33:7: error: stray '\302' in program
             ans++;//统计
       ^
foo.cc:33:8: error: stray '\240' in program
             ans++;//统计
        ^
foo.cc:33:9: error: stray '\302' in program
             ans++;//统计
         ^
foo.cc:33:10: error: stray '\240' in program
             ans++;//统计
          ^
foo.cc:33:11: error: stray '\302' in program
             ans++;//统计
           ^
foo.cc:33:12: error: stray '\240' in program
             ans++;//统计
            ^
foo.cc:33:13: error: stray '\302' in program
             ans++;//统计
             ^
foo.cc:33:14: error: stray '\240' in program
             ans++;//统计
              ^
foo.cc:33:15: error: stray '\302' in program
             ans++;//统计
               ^
foo.cc:33:16: error: stray '\240' in program
             ans++;//统计
                ^
foo.cc:33:17: error: stray '\302' in program
             ans++;//统计
                 ^
foo.cc:33:18: error: stray '\240' in program
             ans++;//统计
                  ^
foo.cc:33:19: error: stray '\302' in program
             ans++;//统计
                   ^
foo.cc:33:20: error: stray '\240' in program
             ans++;//统计
                    ^
foo.cc:33:21: error: stray '\302' in program
             ans++;//统计
                     ^
foo.cc:33:22: error: stray '\240' in program
             ans++;//统计
                      ^
foo.cc:33:23: error: stray '\302' in program
             ans++;//统计
                       ^
foo.cc:33:24: error: stray '\240' in program
             ans++;//统计
                        ^
foo.cc:35:1: error: stray '\302' in program
         }
 ^
foo.cc:35:2: error: stray '\240' in program
         }
  ^
foo.cc:35:3: error: stray '\302' in program
         }
   ^
foo.cc:35:4: error: stray '\240' in program
         }
    ^
foo.cc:35:5: error: stray '\302' in program
         }
     ^
foo.cc:35:6: error: stray '\240' in program
         }
      ^
foo.cc:35:7: error: stray '\302' in program
         }
       ^
foo.cc:35:8: error: stray '\240' in program
         }
        ^
foo.cc:35:9: error: stray '\302' in program
         }
         ^
foo.cc:35:10: error: stray '\240' in program
         }
          ^
foo.cc:35:11: error: stray '\302' in program
         }
           ^
foo.cc:35:12: error: stray '\240' in program
         }
            ^
foo.cc:35:13: error: stray '\302' in program
         }
             ^
foo.cc:35:14: error: stray '\240' in program
         }
              ^
foo.cc:35:15: error: stray '\302' in program
         }
               ^
foo.cc:35:16: error: stray '\240' in program
         }
                ^
foo.cc:37:1: error: stray '\302' in program
     printf("%d",ans);
 ^
foo.cc:37:2: error: stray '\240' in program
     printf("%d",ans);
  ^
foo.cc:37:3: error: stray '\302' in program
     printf("%d",ans);
   ^
foo.cc:37:4: error: stray '\240' in program
     printf("%d",ans);
    ^
foo.cc:37:5: error: stray '\302' in program
     printf("%d",ans);
     ^
foo.cc:37:6: error: stray '\240' in program
     printf("%d",ans);
      ^
foo.cc:37:7: error: stray '\302' in program
     printf("%d",ans);
       ^
foo.cc:37:8: error: stray '\240' in program
     printf("%d",ans);
        ^
foo.cc:39:1: error: stray '\302' in program
     return 0;
 ^
foo.cc:39:2: error: stray '\240' in program
     return 0;
  ^
foo.cc:39:3: error: stray '\302' in program
     return 0;
   ^
foo.cc:39:4: error: stray '\240' in program
     return 0;
    ^
foo.cc:39:5: error: stray '\302' in program
     return 0;
     ^
foo.cc:39:6: error: stray '\240' in program
     return 0;
      ^
foo.cc:39:7: error: stray '\302' in program
     return 0;
       ^
foo.cc:39:8: error: stray '\240' in program
     return 0;
        ^
foo.cc:39:15: error: stray '\302' in program
     return 0;
               ^
foo.cc:39:16: error: stray '\240' in program
     return 0;
                ^
foo.cc: In function 'int main()':
foo.cc:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
         ~~~~~^~~~~~~~~~~~~~

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自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。