$WA = WAr$

$AC = ACcident$

$RE = REfuse$

$CE = CEll$

$WHK = Wonderful~Homework~Killer$

进入正题：

不走寻常路做法，样例过了，但全是$Wonderful~Answer$。

#include<bits/stdc++.h>
using namespace std;
int main(){
	long long q,c,x,a[10001]={},cnt=-1,f=0;
	bool o=0;
	cin >> q;
	for(long long i=1;i<=q;i++){
		cin >> c >> x;
		if(c==5){
			a[++cnt] = x;
		}
		else{
			f = 0;
			sort(a,a+cnt);
			if(c==1){
				while(a[f]!=x){
					f++;
				}
				cout << f+1 << endl;
			}
			else if(c==2){
				cout << a[x-1] << endl;
			}
			else if(c==3){
				while(a[f]<x){
					f++;
					if(f>cnt){
						o=1;
						break;
					}
				}
				if(o==1){
					o=0;
					cout << "-2147483647" << endl;
				}
				else{
					cout << a[f-1] << endl;
				}
			}
			else{
				while(a[f]<=x){
					f++;
					if(f>cnt){
						o=1;
						break;
					}
				}
				if(o==1){
					o=0;
					cout << "2147483647" << endl;
				}
				else{
					cout << a[f] << endl;
				}
			}
		}
	}
	return 0;
} 

$Who~can~help~me?$