最大连续和 Easy
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.
InputThe 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).
OutputFor 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<cstring> #include<cstdio> using namespace std; void Solve(){ int n, x, st, h = 1, t = 1, tmp, ans = 0; static int Case = 0; scanf("%d", &n); for(int i = 1; i <= n; i++){ scanf("%d", &x); if(i == 1){ st = t = 1; tmp = ans = x; }else{ if(x > tmp + x){ st = i; tmp = x; }else tmp += x; } if(tmp > ans){ h = st, t = i; ans = tmp; } } printf("Case %d:\n%d %d %d\n", ++Case, ans, h, t); } int main(){ int T; scanf("%d", &T); while(T--){ Solve(); if(T) printf("\n"); } }