/in/foo.cc: In function 'int main()':
/in/foo.cc:7:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    7 |     for(int i=1;i<=m;i++)
      |     ^~~
/in/foo.cc:9:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    9 |         if(a[x][y]==0)a[x][y]++,s1++;
      |         ^~