hdu-1003-Max Sum
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Max Sum
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 157118 Accepted Submission(s): 36725
Total Submission(s): 157118 Accepted Submission(s): 36725
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
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#include<iostream>using namespace std;int main() { int n,count=0; cin>>n; while(n--) { int a[100001]= {0},m; cin>>m; for(int i=0; i<m; i++) cin>>a[i]; int max=-1000,start=0,end=1,sum=0,newstart=0; for(int i=0; i<m; i++) { sum+=a[i]; if(sum>max) { max=sum; start=newstart+1; end=i+1; } if(sum<0) {//这里要让i往后加,他这肯定会产生正数 newstart=i+1; sum=0; } } count++; cout<<"Case "<<count<<":"<<endl; cout<<max<<" "<<start<<" "<<end<<endl; if(n)cout<<endl;//不能输出多余的换行,否则就是PE } return 0;}
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