信息学奥赛一本通 1312：【例3.4】昆虫繁殖

题目链接：http://ybt.ssoier.cn:8088/problem_show.php?pid=1312

#include <iostream>

using namespace std;

typedef long long ll;

const int N = 60;

ll cheng[N], luan[N];

int main()
{
    
    int x, y, z;
    cin >> x >> y >> z;
    
    z++;
    
    for (int i = 1; i <= x; i++)
    {
    
        cheng[i] = 1;
        luan[i] = 0;
    }
    
    for (int i = x + 1; i <= z; i++)
    {
    
        luan[i] = cheng[i - x] * y;
        cheng[i] = cheng[i - 1] + luan[i - 2];
    }
    
    cout << cheng[z] << endl;
    
    return 0;
}