ACM寒假集训

题目链接：https://vjudge.net/contest/279620#problem/C
代码：

#include <iostream>
using namespace std;
int main()
{
	int a, b,i,sum;
	cin >> a >> b;
	sum = a;
	if (a < 1 || a>1000 || b < 2 || b>1000)
		return 0;
	for (i = 0; i >= 0; i++)
	{
		a = a - b;
		if (a < 0)
			break;
		a = a + 1;
	}
	sum = sum + i;
	cout << sum;
}