Go: package main
import (
	"fmt"
	"os"
	"strconv"
	"bufio"
)

var sc = bufio.NewScanner(os.Stdin)

func main(){
	for sc.Scan(){
		n := nextInt()
		cnt := 0
		// 37以上のとき組み合わせは存在しないが省くのめんどくさいのでまとめて計算
		for a:=0; a<=9; a++{
			for b:=0; b<=9; b++{
				for c:=0; c<=9; c++{
					for d:=0; d<=9; d++{
						if a+b+c+d==n{
							cnt++
						}
					}
				}
			}
		}
		fmt.Println(cnt)
	}
}

func next()string{
	//sc.Scan()
	return sc.Text()
}

func nextInt()int{
	a, _ := strconv.Atoi(next())
	return a
}

C++: #include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
using namespace std;

#define REP(i,n) for(int i=0;i<n;++i)
#define rep(n) REP(i,n)


int main()
{
	int n; 
	while(cin>>n)
	{
		int ans=0;

		REP(i,10) REP(j,10) REP(k,10)
		{
			if( (i+j+k)<n && (i+j+k)+9>=n ) ++ans;
		}

		cout<<ans<<endl;
	}

	return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
	int n,num = 0;
	cin >> n;
	for(int a = 0; a < 10; ++a){
		for(int b = 0; b < 10; ++b){
			for(int c = 0; c < 10; ++c){
				for(int d = 0; d < 10; ++d){
					if(a + b + c + d == n){
						++num;
						break;
					}
				}
			}
		}
	}
	cout << num << '\n';
	return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;

int main(){
	int n;
	while(cin>>n){
		int a=0;
		for(int i=0;i<=9;i++){
			for(int j=0;j<=9;j++){
				for(int k=0;k<=9;k++){
					for(int l=0;l<=9;l++){
						if(i+j+k+l==n) a+=1;
					}
				}
			}
		}
		cout<<a<<endl;
	}
	return 0;
}

C++: // includes
#include <cstdio>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <string>
#include <queue>
#include <stack>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <utility>
#include <functional>
#include <cmath>
#include <climits>
#include <bitset>

// macros
#define ll long long int
#define pb push_back
#define mk make_pair
#define pq priority_queue
#define FOR(i, a, b) for(int i=(a); i<(b);++i)
#define rep(i, n) FOR(i, 0, n)

using namespace std;

//  types
typedef pair<int, int> P;
typedef pair<ll, int> Pl;
typedef pair<ll, ll> Pll;
 
// constants
const int inf = 1e9;
const ll linf = 1LL << 50;
const double EPS = 1e-10;

// solve

int main(int argc, char const* argv[])
{
  int n;
  while(cin >> n){
    int res = 0;
    rep(i, 10){
      rep(j, 10){
        rep(k, 10){
          rep(l, 10){
            if(i + j + k + l == n)res++;
          }
        }
      }
    }
    cout << res << endl;
  }
	return 0;
}

C++: V#include<iostream>

int main(){
	int a,b,c,d,i,n;
	
	i=0;
	std::cin>>n;
	for(a=0;a<=9;a++){
		for(b=0;b<=9;b++){
			for(c=0;c<=9;c++){
				for(d=0;d<=9;d++){
					if(a+b+c+d==n){
						i++;
						}
					}
				}
			}
		}
	std::cout<<i<<std::endl;
	
	return 0;
}

C++: #include<stdio.h>
#include<math.h>

int main()
{
	int n, a, b, c, d, cnt = 0;
	while (scanf("%d", &n) != EOF)
	{
		cnt = 0;
		if (n > 36)
		{
			printf("0\n");
			continue;
		}
		for (a = 0; a < 10; a++)
		{

			if (n - a>27)continue;

			for (b = a; b < 10; b++)
			{
				if (n - a - b > 18)continue;

				for (c = b; c < 10; c++)
				{
					if (n - a - b - c > 9)continue;

					for (d = c; d < 10; d++)
					{

						if (a + b + c + d == n)
						{
							if ((a == b) && (a == c) && (a == d))cnt++;
							else if (((a == b) && (b == c)) | ((b == c) && (c == d)))cnt += 4;
							else if ((a == b) && (c == d))cnt += 6;
							else if ((a == b) | (b == c) | (c == d))cnt += 12;
							else cnt += 24;
						}
					}
				}
			}
		}

		printf("%d\n", cnt);
	}
}

C++: #include<iostream>
using namespace std;
int x,ans;
int main(){
for(){
ans=0;
cin>>x;
if(x=<0)return 0;
for(int i=0;i<10;i++){
for(int j=0;i<10;j++){
for(int k=0;k<10;k++){
if(x-(i+j+k)<10){
ans++;
}
}
}
}
cout<<ans;
}
return 0;
}

C++: #include<iostream>
using namespace std;
int main() {
	int a, b;
	while (cin >> a ) {
		b = 0;
		for (int i = 0; i < 10; i++){
			for (int j = 0; j < 10; j++){
				for (int k = 0; k < 10; k++){
					for (int l = 0; l < 10; l++){
							if (i + j + k + l == a){
								b = b + 1;
						}
					}
				}
			}
		}
		cout << b << endl;
	}
}

C++: #include <iostream>

using namespace std;

int main(){
  int n;
  int a,b,c,d;
  while(cin >> n){
    int ans = 0;
    for(a=0; a<10; a++){
      for(b=0; b<10; b++){
	for(c=0; c<10; c++){
	  for(d=0; d<10; d++){
	    if((a+b+c+d) == n) ans++;
	  }
	}
      }
    }
  cout << ans << endl;
  }
  return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
	int n;
	
	while (cin >> n) {
		int cnt = 0;
		for (int a = 0; a <= 9; ++a) {
			for (int b = 0; b <= 9; ++b) {
				for (int c = 0; c <= 9; ++c) {
					for (int d = 0; d <= 9; ++d) {
						if ((a + b + c + d) == n)
							cnt++;
					}
				}
			}
		}
		cout << cnt << endl;
	}
}

C++: #include<bits/stdc++.h>
#define loop(i, a, b) for(int i = a; i < b; i++) 
#define rep(i, a) loop(i, 0, a)
using namespace std;
const int MOD = 1000000007;
const int inf = 1e8;
using vi = vector <int>;
using vvi = vector <vi>;
using vc = vector <char>;
using vvc = vector <vc>;
using vs = vector <string>;
using vvs = vector <vs>;
//g++ -std==c++14
//setprecision(10)
int n, ans;

int main(){
    while(cin >> n){
        ans = 0;
        rep(i, 10)rep(j, 10)rep(k, 10)rep(l, 10)if(i + j + k + l == n)ans++;
        cout << ans << endl;
    }
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include <cstdio>
#include <cmath>
#include <stdint.h>
using namespace std;

int main()
{
  for (int n; cin >> n; ) {
    int ans = 0;
    for (int a = 0; a <= 9; a++)
    for (int b = 0; b <= 9; b++)
    for (int c = 0; c <= 9; c++)
    for (int d = 0; d <= 9; d++)
      if (a + b + c + d == n) ans++;
    cout << ans << endl;
  }

  return 0;
}

C++: #include <iostream>
using namespace std;

int main(){
	int t = 0;
	int n;
	int a[1000];
	for(int i = 0; i < 1000; i++){
		a[i] = 1;
	}
	while(cin >> n){
		if(n > 36 || n < 0){
			a[t] = 0;
		}
		else if(n > 18){
			n = 36-n;
		}
		for(int i = n+3; i > n; i--){
			a[t] = a[t]*i;
		}
		a[t] = a[t]/6;
		t++;
	}
	for(int i = 0; i < t; i++){
		cout << a[i] << endl;
	}
}

C++: #include <iostream>
using namespace std;

int main(){
    int n;
    int result = 0;

    while(cin >> n){
        for(int i=0; i<10; i++){
            for(int j=0; j<10; j++){
                for(int k=0; k<10; k++){
                    for(int l=0; l<10; l++){
                        if(i+j+k+l == n){
                            result++;
                            break;
                        }
                    }
                }
            }
        }
        cout << result << endl;
        result = 0;
    }
    return 0;
}

C++: #include <iostream>
using namespace std;

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	
	int n;
	while(cin >> n){
	
	int ans = 0;
	for(int i = 0; i <= 9; ++i){
		for(int j = 0; j <= 9; ++j){
			for(int k = 0; k <= 9; ++k){
				for(int l = 0; l <= 9; ++l){
					if(i + j + k + l == n){
						ans++;
					}
				}
			}
		}
	}
	
	cout << ans << endl;
	
	}
	
	return 0;
}

C++: #include <iostream>
using namespace std;

int main(){
  int memo[51] = {0};
  for(int i = 0; i < 10; i++)
    for(int j = 0; j < 10; j++)
      memo[i + j]++;
  int n;
  while(cin >> n){
    int res = 0;
    for(int i = 0; i <= n; i++)
      res += memo[i] * memo[n - i];
    cout << res << endl;
  }
}