hdu 5783 Divide the Sequence 贪心

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5783

题意:给你n个整数,将它分成若干个前缀和大于等于0的块,求块的最大个数。

题解:题目保证有解。从后向前贪心,当前和大于等于0时,序列个数增加一。

 1 #include<bits/stdc++.h>
 2 typedef long long LL;
 3 const int maxn = 1000000 + 50;
 4 int a[maxn];
 5 
 6 int main(){
 7     int n;
 8     while(scanf("%d",&n) == 1){
 9         for(int i = 1; i <= n; ++i){
10              scanf("%d",&a[i]);
11         }
12         LL now = 0;
13         int ans = 0;
14         for(int i = n; i > 0; --i){
15             now += a[i];
16             if(now >= 0){
17                 now = 0;
18                 ans++;
19             }
20         }
21         printf("%d
",ans);
22     }
23     return 0;
24 }
原文地址:https://www.cnblogs.com/Pos-Proteus/p/5734185.html