hdu 1003

Max Sum

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 82954    Accepted Submission(s): 19109

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 a[100001];
int main()
{
    long n,max,sum,xi,x,y,k,m,i;
    //long long n,max,sum,xi,x,y,k,m,i;
    cin>>n;
    for(k=1;k<=n;k++)
    {
        cin>>m;
        max=-2;
        if(k!=1)  
            cout<<endl;
        for(i=0;i<m;i++)
            cin>>a[i];
        sum=-2;
        for(i=0;i<m;i++)
        {
            if(sum>=0)
                sum+=a[i];
            else
            {
                sum=a[i];
                xi=i;
            }
            if(sum>=max)
            {
                max=sum;
                x=xi;
                y=i;
            }
        }
        cout<<"Case "<<k<<':'<<endl;
        cout<<max<<' '<<x+1<<' '<<y+1<<endl;
    }
    return 0;
}