/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<=n;i++)
      |     ^~~
/in/foo.cc:10:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   10 |         cnt=0;
      |         ^~~
/in/foo.cc:19:24: warning: statement has no effect [-Wunused-value]
   19 |                 b[i][j]==a[x][y];
      |                 ~~~~~~~^~~~~~~~~