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104 A.cpp
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/**
* Git >> Mohsin_Riad
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**/
#include<bits/stdc++.h>
using namespace std;
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define mx 1000
#define endl "\n"
#define pb push_back
#define pob pop_back
typedef long long ll;
typedef double dd;
const int N = 1e5;
int main()
{
IOS
//freopen("input.txt", "r", stdin);
int n;
cin>>n;
if(n>10)
{
n-=10;
if(n>11) cout<<"0"<<endl;
else if(n==10) cout<<"15"<<endl;
else if(n<=9 && 2<=n || n==11 || n==1) cout<<"4"<<endl;
}
else cout<<"0"<<endl;
return (0);
}