Max Sum

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 158949    Accepted Submission(s): 37195

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

25 6 -1 5 4 -77 0 6 -1 1 -6 7 -5

 

Sample Output

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

 

Author

Ignatius.L

 

这个是回顾一下，之前不会。。现在知道了……

 #include<iostream>
#include<stdio.h>
#include<string.h>
using namespace std;
int a[100000];
int main()
{
int T,N,i;
int count=1;
cin>>T;
while(T--)
{
      memset(a,0,sizeof(a));
  int sum=0;
  int max=-1001;
  int start=1,k=1,end=1;
      cin>>N;
      for(i=0;i<N;i++)
  cin>>a[i];
  for(i=0;i<N;i++)
  {
         sum=sum+a[i];
if(sum>max)
{     max=sum;
start=k;
end=i+1;
}
if(sum<0)
{
k=i+2;
sum=0;
}
  }
  printf("Case %d:\n",count++);
  printf("%d %d %d\n",max,start,end);
  if(T!=0)
  cout<<endl;
}
return 0;
}