C :

#include<string.h>
#include<stdio.h>
int main()
{
    int m;
    scanf("%d",&m);
     if(m>=15&&m<=30)
         printf("qingnianzu");
       if(m>=11&&m<=14)
           printf("shaonianzu");
       if(m>=8&&m<=10)
           printf("ertongzu");
     
    return 0;
}

C++ :

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n >= 15){
		cout<<"qingnianzu";
	}else if(n >= 14){
		cout<<"shaonianzu";
	}else if(n >= 8){
		cout<<"ertongzu";
	}
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		if(n >= 15 && n <= 30){
			System.out.println("qingnianzu");
		}else if(n >=11 && n <= 14){
			System.out.println("shaonianzu");
		}else if(n >=8 && n <= 10){
			System.out.println("ertongzu");
		}
		sc.close();
	}

}

Python :

n = int(input())
if 8 <= n <= 10:
    print('ertongzu')
if 11 <= n <= 14:
    print('shaonianzu')
if 15 <= n <= 30:
    print('qingnianzu')