C :

#include <stdio.h>
#include <stdlib.h>
int main()
{
	int n;
	scanf("%d",&n);
	if(n>90)
		printf("yes\n");
	return 0;
}
//Author: ITProgrammer

C++ :

#include <iostream>
using namespace std;
int main(){
   int a;
   cin>>a;
   if(a >= 90){
   	  cout<<"yes"<<endl;
   }
   return 0;
}

Pascal :

var a:longint;
begin
read(a);
if a>=90 then write('yes');
           end.

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		if(a>=90) {
			System.out.println("yes");
		}
	}
}

Python :

num=int(input())
if num >90:
    print('yes')