View Code of Problem 1090

#include<cstdio>

int main(){
	int n;
	scanf("%d",&n);
	int ans;
	if(n<=10) ans=0;
	if(n==11) ans=4;
	if(n>=12&&n<=19) ans=4;
	if(n==20) ans=15;
	if(n==21) ans=4;
	if(n>=22&&n<=25) ans=0;
	printf("%d\n",ans);
	return 0;
}