hdu_5783_Divide the Sequence(贪心)
题目链接:hdu_5783_Divide the Sequence
题意:
给你一个数列,让你分尽可能多的段,并且保证每一段的前缀和都不小于0
题解:
从后往前xjb贪心就行了
1 #include<cstdio> 2 3 const int N=1e6+7; 4 int a[N]; 5 int main() 6 { 7 int n; 8 while(~scanf("%d",&n)) 9 { 10 for(int i=1;i<=n;i++)scanf("%d",a+i); 11 long long sum=0,ans=0; 12 for(int i=n;i>=1;i--) 13 { 14 sum+=a[i]; 15 if(sum>=0)ans++,sum=0; 16 } 17 printf("%lld\n",ans); 18 } 19 return 0; 20 }