/in/foo.cc: In function 'int main()':
/in/foo.cc:16:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for (int i = 1; i <= n; i++) 
   ^~~
/in/foo.cc:28:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     int ans = n-f[n][n];
     ^~~