1.链接

登录—专业IT笔试面试备考平台_牛客网

2.题目

3.代码

#include<iostream>
#include<vector>

using namespace std;

const int N = 1e7 + 5;

int n,x;

vector<int> v(N);

int main()
{
    cin >> n >> x;
    for(int i = 0; i < n;i++) cin >> v[i];
    
    int r,l,sum,len,rr,rl;
    r = l = sum = 0;
    len = n;
    
    while(r < n)
    {
        sum += v[r];
        while(sum >= x)
        {
            if(len > r - l)
            {
                rr = r;
                rl = l;
                len = r - l;
            }
            sum -= v[l++];
        }
        r++;
    }
    
    cout << rl+1 << " " << rr+1;
    return 0;
}

4.失败代码(博主复习专用，可不看)

#include<iostream>
#include<vector>

using namespace std;

int main()
{
    int n,x;
    cin >> n >> x;
    
    vector<int> v(n);
    
    int r,l,rr,rl,count,sum,lens;
    r = l = sum = count = 0;
    lens = n;
    
    for(int i = 0; i < n; i++)
    {
        cin >> v[i];
    }
    for(int i = 0; i < n; i++)
    {
        if(sum < x)
        {
            if( i == 0) sum = v[i];
            else sum += v[l];
            l++;
        }
        else
        {
            if(lens >= (l-r) )
            {
                rl = l;
                rr = r;
            }
            lens = l - r;
            r++;
            if( sum - v[count]  <= x) break;
            sum -= v[count];
            count++;
        }
    }
    
    cout << rr + 1 << " "<< rl;
    
    return 0;
}

5.思路