明明有O2,O3,cin加速？

#include<bits/stdc++.h>
#pragma GCC/*G++*/ optimize(2)
#pragma GCC/*G++*/ optimize(3)
using namespace std;
long long n;
int main(){
	ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    if(n<100){
    	cout<<"00";
	}else if(n<1000){
		cout<<0/(n/100);
	}else if(n<=5000){
		cout<<n/100;
	}else if(n<=30000){
		cout<<n/1000+50;
	}else if(n<=70000){
		cout<<(n/1000-30)/5+80;
	}else{
		cout<<89;
	}
    return 0;
}