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> #include <cstdio> #define MAX 100005 using namespace std; int a[MAX]; int main() { int T,N,t=0,sum[MAX],s[MAX],ans,tt; cin>>T; tt=T; while(tt--) { cin>>N; for(int i=0;i<N;i++) cin>>a[i]; sum[0]=a[0]; s[0]=0; ans=0; for(int i=1;i<N;i++) { if(sum[i-1]>=0) { sum[i]=sum[i-1]+a[i]; s[i]=s[i-1]; } else { sum[i]=a[i]; s[i]=i; } if(sum[ans]<sum[i]) ans=i; } printf("Case %d:\n%d %d %d\n",++t,sum[ans],s[ans]+1,ans+1); if(t!=T) cout<<endl; } return 0; }