HDU 1003 Max Sum(DP)

题目地址:HDU 1003

DP好弱。。先补补DP的基础。。。

这题就是记录起始点与终止点,然后每当发现一个更大的,就更新。从左往右扫一遍就行了。

代码如下:

#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <stdlib.h>
#include <math.h>
#include <ctype.h>
#include <queue>
#include <map>
#include <set>
#include <algorithm>

using namespace std;
int a[110000];
int main()
{
    int T, num=0, i, s, t, x, n, max1, sum;
    scanf("%d",&T);
    while(T--)
    {
        num++;
        scanf("%d",&n);
        for(i=0;i<n;i++)
        {
            scanf("%d",&a[i]);
        }
        sum=a[0];
        max1=sum;
        s=0;
        t=0;
        x=0;
        for(i=1;i<n;i++)
        {
            sum+=a[i];
            if(sum<a[i])
            {
                x=i;
                sum=a[i];
            }
            if(sum>max1)
            {
                s=x;
                t=i;
                max1=sum;
            }
        }
        printf("Case %d:\n",num);
        printf("%d %d %d\n",max1,s+1,t+1);
        if(T)
            printf("\n");
    }
    return 0;
}
时间: 2024-10-12 20:49:45

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