/in/foo.cc: In function 'long long int calc(long long int)':
/in/foo.cc:35:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (long long i=2;i<=m;++i)
  ^~~
/in/foo.cc:41:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   if (n>1) ans=ans/n*(n-1);
   ^~