/in/foo.cc: In function 'int main()':
/in/foo.cc:41:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i = 2; i <= n; ++i)
     ^~~
/in/foo.cc:61:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
         double ans = 1.0*INF;
         ^~~~~~