这怎么会超时？？？

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n,s = 0;
    cin >> n;
    int a[300009] = {};
    for (int i = 1;i<=n;i++)
    {
        cin >> a[i];
    }
    cout << 666;
    for (int i = 1;i<=n;i++)
    {
        int b[300009] = {};
        
        for (int j = 1, x = 1;j<=n-1;x++)
        {
            if(j!=i)
            {
                b[j] = a[x];
                j++;
            }
        }
        bool f = 1;
        sort(b+1,b+n);
        int t = n-1;
        for (int j = 1;j<n;j++)
        {
            if(b[j]+t>a[i]+n)
            {
                f = 0;
                break;
            }
            t--;
        }
        if(f)s++;
    }
    cout << s;
    return 0;
}