题解 P2669 【金币】

似乎我这个“蒟蒻”跟各位DALAO想的不太一样

首先,输入n,使用一层循环搞定

具体思路:

使用ans作为累加器,k记录发几枚金币,s负责不断赋值给累加器,sum当这些天数的金币发完后,及时更新k, 每次发完,k--,证明发* 枚金币 少了一天,例如,k = 3时:

执行流程:

1.s = 3

2.ans += 3(ans = 3);

3.k--(k = 2);

1.s = 3

2.ans += 3(ans = 6);

3.k--(k = 1);

1.s = 3

2.ans += 3(ans = 9);

3.k--(k = 0);

4.k = sum(sum = 4;k = 4)

5.s = k(s = 4)

6.sum++(sum = 5)

#include <iostream>
#include <algorithm>
#include <stdio.h>
#include <cstring>
using namespace std;
int main() {
    int n;int ans = 0,k = 1,s = k,sum = 2;
    scanf("%d",&n);
    for(int i = 1;i<=n;++i) {
        ans+=s;
        k--;
        if(k == 0) {
            k = sum;s = k;
            sum++;
        }
    }
    cout<<ans;
    return 0;//不写return 0;成绩return 0; 
} 
posted @ 2019-03-04 09:47  littlefrog  阅读(182)  评论(0编辑  收藏  举报