#39764: c++詳解
yp11251144@yphs.tp.edu.tw
(911-38曾湛)
哈囉
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
cin>>n;
if(n>=15) cout<<n-15<<endl;
else cout<<n+9<<endl;
return 0;
}