720. 连续整数相加(C++语法题)

代码

#include <iostream>

using namespace std;

int main() {
        
    int a,n;
    cin >> a;
    while (cin >> n,n <= 0);
    
    int s = 0;
    for (int i = 0; i < n; i++) s += a + i;
    
    cout << s << endl;
    
    return 0;
    
}