2669 . 单选题

某货币由5元,2元和1元组成。输入金额(假设为正整数),计算出最少数量。为实现其功能,横线处应填入代码是

int N;
cin >> N;
int M5, M2, M1;
M5 = N / 5;
M2 = ______________;
M1 = ______________;
printf("5*%d+2*%d+1*%d", M5, M2, M1);