#include <stdio.h>

int main(void) {
	
	int year,flag;
	flag = 0;
	printf("年齢を入力してください\n");
	scanf("%d",&year);
	
	if(year < 6){
		flag = 0;
	}else if(year <= 12){
		flag = 1;
	}else if(year <= 15){
		flag = 2;
	}else{
		flag = 3;
	}
	
	switch(flag){
		case(0):
		printf("無料\n");
		break;
		
		case(1):
		printf("１００円\n");
		break;
		
		case(2):
		printf("２００円\n");
		break;
		
		case(3):
		printf("３００円\n");
		break;		
	}
	return 0;
}