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>

using namespace std;

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

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

int dfs(int n, int cnt) {
    if (n == 0) return 1;
    if (cnt == 4) return 0;

    int ret = 0;
    for (int i = 0; i < 10; i++) {
        ret += dfs(n-i, cnt+1);
    }

    return ret;
}

int main(void) {
    int n;
    while (cin >> n) {
        int ret = dfs(n, 0);
        cout << ret << endl;
    }

    return 0;
}

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



int main() {
	int a, b, c, d, n;
	int ans = 0;
	while (cin >> n) {
		
		for (a = 0; a <= 9; a = a + 1) {
			for (b = 0; b <= 9; b = b + 1) {
				for (c = 0; c <= 9; c = c + 1) {
					for (d = 0; d <= 9; d = d + 1) {
						if (a + b + c + d == n) {
							ans = ans + 1;
						}
					}
				}
			}
		}
	}
	cout << ans << '\n';
	return 0;
}

C++: //
//  main.cpp
//  CppTest
//
//  Created by Ryu on 2017/02/08.
//  Copyright ?? 2017??´ Ryu. All rights reserved.
//

#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
using namespace std;

int main(int argc, const char * argv[]) {
    // insert code here...
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int n[50];
    int comb[50];
    int m = 0;
    while (cin >> n[m]) {
        comb[m] = 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[m]) {
                            comb[m]++;
                        }
                    }
                }
            }
        }
        m++;
    }
    
    for (int i = 0; i < m; i++) {
        printf("%d\n", comb[i]);
    }
    printf("\n");
    
    return 0;
}

C++: #include <iostream>

using namespace std;

void solve()
{
	int n;
	while(cin >> n)
	{
		int ans = 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 == n)
						{
							++ans;
						}
					}
				}
			}
		}
		cout << ans << endl;
	}
}

int main()
{
	solve();
	return(0);
}

C++: #include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
#include<stdio.h>
#include<cmath>
#include<vector>
#include<utility>
#include<stack>
#include<queue>

#define FOR(i, a, b) for(int i=(a);i<=(b);i++)
#define RFOR(i, a, b) for(int i=(a);i>=(b);i--)
#define MOD 1000000007

using namespace std;

int main(void) {
	int n;
	int count = 0;

	while (cin >> n) {
		FOR(i, 0, 9) {
			FOR(t, 0, 9) {
				FOR(s, 0, 9) {
					FOR(u, 0, 9) {
						if (i + t + s + u == n) {
							count++;
						}
					}
				}
			}
		}
		cout << count << endl;
		count = 0;
	}
	
	return 0;
}

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

int main(void)
{
    int n = 0;
    
    while(cin >> n){
        int ans = 0;
        if(n >= 37){
            cout << ans << endl;
            continue;
        }

        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) ans++;
                    }
                }
            }
        }
        cout << ans << endl;
    }
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main() {
  int n;
  while (cin >> n) {
    int ans = 0;
    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) ++ans;
          }
        }
      }
    }
    cout << ans << endl;
  }
  return 0;
}

C++: #include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <string>
#include <functional>
#include <numeric>
#include <ctype.h>
#include <cstdlib>
#include <string.h>
#include <cmath>
#include <cstdio>





using namespace std;


int main()
{
	int count = 0, num;

	

	while (cin >> num)
	{
		num = 0;
		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 == num)
							count++;
					}
				}
			}
		}
		cout << count << endl;
	}

	

}

C++: //--------------------------------------------------template----------------------------------------//
//c
#include <stdio.h>
#include <time.h>
#include <math.h>
//c++
#include <cstdio>
#include <iostream>
#include <algorithm>
#include <functional>
#include <cstdlib>
#include <sstream>
#include <string>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <complex>
#include <cmath>
//c++11
#include <tuple>
#define all(c) ((c).begin(),(c).end())
#define rall(c) (c).rbegin(),(c).rend()
//#define sort(v,n) sort(v,v+n)
//#define vsort(v) sort(v.begin(),v.end())
#define vvsort(v) sort(v.rbegin(),v.rend())
#define ll long long
#define pb(a) push_back(a)
#define fi first
#define se second
#define inf 999999999
using namespace std;
const ll MOD = 1e9 + 7;
const double PI = acos(-1.0);
//---------------------------------------------------------------------------------------------//
int n;

int main() {
	while (cin >> n) {
		ll cont = 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 == n)cont++;
					}
				}
			}
		}
		cout << cont << endl;
	}
}

C++: #include <stdio.h>
int main(){
    int n,ans;
    while(scanf("%d",&n)!=EOF){
        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++;
                }
            }
        }
    }
        printf("%d\n",ans);
    }
}

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

int main(){
int n,a,b,c,d,j;
while(1){
  j=0;
  cin>>n;
    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) j++;
	  }
	  if(a+b+c+d==n) j++;
	}
	if(a+b+c+d==n) j++;
      }
      if(a+b+c+d==n) j++;
    }
    cout<<j<<endl;
  }
  return 0;
}

C++: #include<cstdio>
#include<algorithm>
#include<memory>
#include<string>
using namespace std;

int DP[10][100];
int N;

int main()
{
	while(scanf("%d",&N)!=EOF)
	{
		memset(DP,0,sizeof(DP));
		DP[0][0]=1;
		for(int i= 0;i<=4;i++)
		{
			for(int j=0;j<=N;j++)
			{
				for(int k=0;k<10;k++)
				{
					DP[i+1][j+k]+=DP[i][j];
				}
			}
		}
		printf("%d\n",DP[4][N]);
	}
　　　return 0;
}