/in/foo.cc: In function 'int find(int, int)':
/in/foo.cc:12:3: error: 'g' was not declared in this scope
   g[num++]=y; 
   ^
/in/foo.cc:12:5: error: 'num' was not declared in this scope
   g[num++]=y; 
     ^~~
/in/foo.cc:20:3: error: 'g' was not declared in this scope
   g[num++]=y-1;
   ^
/in/foo.cc:20:5: error: 'num' was not declared in this scope
   g[num++]=y-1;
     ^~~
/in/foo.cc:28:3: error: 'g' was not declared in this scope
   g[num++]=y+1;
   ^
/in/foo.cc:28:5: error: 'num' was not declared in this scope
   g[num++]=y+1;
     ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:49:8: error: 'i' was not declared in this scope
   for (i=1;i<=n;i++)
        ^
/in/foo.cc:51:3: error: 'dp' was not declared in this scope
   dp[1][i] = spend[1][i];
   ^~
/in/foo.cc:51:14: error: 'spend' was not declared in this scope
   dp[1][i] = spend[1][i];
              ^~~~~
/in/foo.cc:53:7: error: 'i' was not declared in this scope
  for (i=0;i<=m;i++)
       ^
/in/foo.cc:55:3: error: 'dp' was not declared in this scope
   dp[i][0] = MAXN;
   ^~
/in/foo.cc:55:14: error: 'MAXN' was not declared in this scope
   dp[i][0] = MAXN;
              ^~~~
/in/foo.cc:68:2: error: 'g' was not declared in this scope
  g[num++]=mini;
  ^
/in/foo.cc:68:4: error: 'num' was not declared in this scope
  g[num++]=mini;
    ^~~
/in/foo.cc: In function 'int find(int, int)':
/in/foo.cc:34:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^