ACM题目————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

题目大意:

求数组连续元素和大于等于K 的最小连续个数!

代码:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
#include <iostream>
 
using namespace std;
 
int a[100005];
 
int main()
{
    int T, n, K, pos, low, minn;
    cin >> T ;
    while(T--)
    {
        cin >> n >> K ;
        minn = n ;
        int sum = 0;
        low = 0;
        pos = 0;
        for(int i=0; i<n; i++) cin >> a[i] ;
        for( ; ; ++ low)
        {
            while(sum<=K && pos < n) sum += a[pos++] ;
            if(sum<K) break ;
            sum -= a[low];
            minn = min(minn,pos-low);
        }
        if(minn==n) cout << "0" << endl ;
        else cout << minn << endl ;
    }
 
    return 0;
}

 

posted @   Asimple  阅读(404)  评论(0编辑  收藏  举报
编辑推荐:
· 基于Microsoft.Extensions.AI核心库实现RAG应用
· Linux系列:如何用heaptrack跟踪.NET程序的非托管内存泄露
· 开发者必知的日志记录最佳实践
· SQL Server 2025 AI相关能力初探
· Linux系列:如何用 C#调用 C方法造成内存泄露
阅读排行:
· 终于写完轮子一部分:tcp代理 了,记录一下
· 震惊!C++程序真的从main开始吗?99%的程序员都答错了
· 别再用vector<bool>了!Google高级工程师:这可能是STL最大的设计失误
· 单元测试从入门到精通
· 【硬核科普】Trae如何「偷看」你的代码?零基础破解AI编程运行原理
点击右上角即可分享
微信分享提示