from functools import reduce
from operator import le
import sys, os
import math
from collections import Counter
TC = False
def lexiographic_sort_array(arr):
return sorted(arr, key=lambda x: str(x))
def solve():
n = int(input())
if n==20:
print(15)
elif n>10 and n<=21:
print(4)
else:
print(0)
if os.path.exists('input.txt'):
debug = True
sys.stdin = open("input.txt","r")
if TC:
for _ in range(int(input())):
solve()
else:
solve()#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
cin >> n;
if(n<=10) cout << 0;
if(11 <= n && n<=19) cout << 4;
if(n==20) cout << 15;
if(n==21) cout << 4;
if(22<=n && n<=25) cout << 0;
}746B - Decoding | 1424G - Years |
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1099A - Snowball | 1651D - Nearest Excluded Points |
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