POJ---3061 Subsequence【尺取法】

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

SOURCE:点击打开链接

题意：给定长度为n的整数序列以及整数S，求出总和不小于S的连续子序列的长度的最小值，无解输出0；

解析：因为全部为正整数，可以用尺取法。

代码：

#include 
#include 
#include 
#define MAXN 100005
using namespace std;

int a[MAXN];
int t,n,s,num,res;

int main(void)
{
    int begin,end;
    scanf("%d",&t);
    while(t--)
    {
        num=0,res=0x7fffffff,begin=0,end=0;
        scanf("%d%d",&n,&s);
        for(int i=0; in)
            res=0;
        printf("%d\n",res);
    }
    return 0;
}