Max Sum(dp水题)
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http://acm.hdu.edu.cn/showproblem.php?pid=1003
还是子序列求和
Max Sum
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 186386 Accepted Submission(s): 43487
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
#include <cstdio>int main(){ int t; scanf("%d",&t); for(int Case=1;Case<=t;Case++){ int a,max_sum=-1001,max_first,max_last,tot=-1,last,first; int d; scanf("%d",&d); for(int i=1;i<=d;i++){ scanf("%d",&a); if(tot<0){ first=last=i; tot=a; } else { tot+=a;last=i; } if(tot>max_sum){ max_sum=tot; max_first=first; max_last=last; } } printf("Case %d:\n%d %d %d\n",Case,max_sum,max_first,max_last); if(Case!=t)printf("\n"); } return 0;}AC之路,我选择坚持~~
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