求助大佬

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
using namespace std;
struct u{
    int start,end;
};
int n,pos,posd,ans;
u a[40005];
int ii=1;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i].end;
        a[i].start=i;
    }
    while(ii<=n){
        pos=a[ii].start;
        posd=a[ii].end;
        for(int i=1;i<=n;i++){
        if(a[i].end<=posd) ans++;
        if(i==n){
            pos=0;
               posd=0;
               ii++;
               i=1;
        }
    }
}
    cout<<ans;
    return 0;
}
为什么超时，我就是个蒟蒻······大佬勿喷······