HDU 1003 ( Max Sum )

版权声明：本人原创，转载请注明出处！ https://blog.csdn.net/qq_29117927/article/details/82078629

                                            Max Sum

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 294795 Accepted Submission(s): 70011

Problem Description
Given a sequence a[1],a[2],a[3]……a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7), the max sum in this sequence is 6 + (-1) + 5 + 4 = 14.

Input
The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow, each line starts with a number N(1<=N<=100000), then N integers followed(all the integers are between -1000 and 1000).

Output
For each test case, you should output two lines. The first line is “Case #:”, # means the number of the test case. The second line contains three integers, the Max Sum in the sequence, the start position of the sub-sequence, the end position of the sub-sequence. If there are more than one result, output the first one. Output a blank line between two cases.

Sample Input

2
5 6 -1 5 4 -7
7 0 6 -1 1 -6 7 -5

Sample Output

Case 1:
14 1 4
Case 2:
7 1 6

#include<iostream>
using namespace std;
int main()
{
    int t,i,m=0,n,a[100001],s=0,num=-1001,x,y,j,z;
    cin>>t;
    for(i=1;i<=t;i++)
    {
        cin>>n;
        for(j=0;j<n;j++)
        {
            cin>>a[j];
        }
        m=0;
        for(j=0;j<n;j++)
        {
            s=s+a[j];
            if(s>=0)
            {
                if(s>=num)
                {
                    num=s;
                    x=m;
                    y=j;
                }
            }
            else
            {
                if(s>num)
                {
                    num=s;
                    x=m;
                    y=j;
                }
                m=j+1;
                s=0; 
            }
        }
        cout<<"Case "<<i<<":"<<endl;
        cout<<num<<' '<<x+1<<' '<<y+1<<endl;
        if(i!=t)
            cout<<endl;
        num=-1001;
        s=0;
        x=0;
        y=0;
    }
}