/in/foo.cc: In function 'int main()':
/in/foo.cc:40:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=1;i<=n;i++)
  ^~~
/in/foo.cc:46:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   v[sx][sy]=1;
   ^