POJ 3061 Subsequence(前缀和)

该博客主要介绍了如何解决POJ 3061题目的算法,该题目要求找到一个序列中连续元素的最小子序列,其和大于或等于给定的目标值S。博主通过使用前缀和的方法,定义两个边界进行遍历,以找到符合条件的子序列。在遍历过程中,不断调整边界并记录最小长度。如果找不到满足条件的子序列,则输出0。

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Subsequence

Description

A sequence of N positive integers (10 < N < 100 000), each of them less than or equal 10000, and a positive integer S (S < 100 000 000) are given. Write a program to find the minimal length of the subsequence of consecutive elements of the sequence, the sum of which is greater than or equal to S.
Input

The first line is the number of test cases. For each test case the program has to read the numbers N and S, separated by an interval, from the first line. The numbers of the sequence are given in the second line of the test case, separated by intervals. The input will finish with the end of file.
Output

For each the case the program has to print the result on separate line of the output file.if no answer, print 0.
Sample Input

2
10 15
5 1 3 5 10 7 4 9 2 8
5 11
1 2 3 4 5

Sample Output

2
3
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