/in/foo.cc: In function 'int main()':
/in/foo.cc:76:56: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long long int' [-Wformat=]
     printf("%d %d %I64d\n",cnt[i].i,cnt[i].j,cnt[i].val);
                                              ~~~~~~~~~~^
/in/foo.cc:21:6: warning: unused variable 'l' [-Wunused-variable]
  int l,n,m,A,B,top,hid;
      ^
/in/foo.cc:22:12: warning: unused variable 'res' [-Wunused-variable]
  long long res;
            ^~~