/in/foo.cc: In function 'int main()':
/in/foo.cc:54:22: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d",s[len-1]);
                      ^
/in/foo.cc:57:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d",s[i]);
                   ^
/in/foo.cc:58:41: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   else if(s[i] >= 100) printf("0%d",s[i]);
                                         ^
/in/foo.cc:59:41: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   else if(s[i] >= 10) printf("00%d",s[i]);
                                         ^
/in/foo.cc:60:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   else printf("000%d",s[i]);
                           ^