程序代码：

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
    int w[10005]={0},n,s,ans=9999;
    cin>>n>>s;
    for(int i=1;i<=n;i++){
        cin>>w[i];
    }
    int sum=0,i,j=1;
    for(i=1;i<=n;i++){
        while(j<=n&&sum<s){
            sum+=w[j++];
        }
        if(sum<s){
            break;
        }
        ans=min(ans,j-i);
        sum-=w[i];
    }
    if(ans==9999){
        cout<<"-1"<<endl;
    }
    else
        cout<<ans<<endl;
    return 0;
}