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

int main(){
	int n, i, a,b,c,d;

	while(~scanf("%d", &n)){

	for(i=0, 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) i++;	
				}
			}
		}
	}

	printf("%d\n", i);
	}
 return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <algorithm>
#include <math.h>
#include <vector>
#include <string>
#include <sstream>

#define rep(i, j) for(int i = 0; i < j; i++)
// sp_rep
#define rep2(i, j) for(int i = 0; i <= j; i++)
#define all(i) i.begin(), i.end()
#define ll long long

using namespace std;

string Num2Str(int num)
{
	stringstream ss;
	ss << num;
	return ss.str();
}

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	// code
	int n, cnt = 0;
	cin >> n;
	rep2(a, 9) {
		rep2(b, 9) {
			rep2(c, 9) {
				rep2(d, 9) {
					if (n == (a + b + c + d)) cnt++;
				}
			}
		}
	}
	cout << cnt << endl;

	return 0;
}

C++: #include"iostean.h"
#include<string>
#include<algorithm>
#include<iomanip>
using namespace std;
#define pi 3.141592653589793283462
int main(){
    int c;
	int d=0;
	while (cin>>c)
	{
		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==c)
						   d++;
					}
				}
			}
		}
	}
	cout<<d<<endl;
	return 0;
}

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

int main(){
	
	int n;
	while(cin>>n){
		int ans=0;
		for(int i=0;i<10000;i++){
			if(i%10+i%100/10+i%1000/100+i/1000==n)ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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


int main()
{
	int i, S, n;
	while (cin >> n) {
		i = 0;
		for (S = 1;S <= 9999;S++) {
			if (S/1000+(S-S/1000*1000)/100+(S-S/100*100)/10+S-S/10*10==n)  
				i++;
		}
		cout << i << endl;
	}
    return 0;
}

C++: #include<cstdio>
main(){for(int i,c,k,n,j;scanf("%d",&n);k=0){for(i=0;i<1e4;c=0){for(j=i++;j>0;j/=10)c+=j%10;c-n?k:k++;}printf("%d\n",k);}}

C++: #include <iostream>

using namespace std;

int main(void){
    int num;
    int count;
    while(cin >> num){
        count = 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(num == i + j + k + l) count++;
                    }
                }
            }
        }
        cout << count << "\n";
    }
    return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
int n;
cin>>n;
int counter=0;
for(int a=0;a<10;a++){
for(int b=0;b<10;b++){
for(int c=0;c<10;c++){
if(0<=n-a-b-c && n-a-b-c<=9){
counter++;
}
}
}
}
cout<<counter<<endl;
return 0;
}

C++: #include <iostream>

using namespace std;

int main()
{
	int n;
	while ( cin >> n ) {
		int count;
		if (n>36) count = 0;
		else if (n<=9) count = ((n+1)*(n+2)*(n+3))/6;
		else if (n<=18) count = 5*n*n - 3*n - 158;
		// ((n+1)*(n+2)*(n+3))/6 - ((n-10+1)*(n-10+2)*(n-10+3))/6 + 27 * (n-9)
		else if (n<=27) count = 5*(36-n)*(36-n) - 3*(36-n) - 158;
		else count = ((37-n)*(38-n)*(39-n))/6;
		
		cout << count << endl;
	}
	
	return 0;
}

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

using _i64 = int64_t;
using _u64 = uint64_t;
using _f64 = double;

#define _for(i, start, end) for(_i64 i = (_i64)start; i < (_i64)end; ++i)
#define _rep(i, number) _for(i, 0, number)
#define _foreach(e, data) for(auto& e : data)
#define _all(data) data.begin(), data.end()

template<typename type>
_i64 _size(const type& data) { return static_cast<_i64>(data.size()); }
template<typename type, size_t size>
_i64 _size(const type (&)[size]) { return static_cast<_i64>(size); }

enum _flag : bool { able = true, disable = false };

struct _time {
    _time(_flag flag) { check = flag; if(!check) { return; } gettime(start); }
    ~_time() {
        if(!check) { return; }; gettime(end);
        _i64 elapse = chrono::duration_cast<chrono::milliseconds>(end - start).count();
        cout << endl << "Time: " << elapse << " ms" << endl;
    }
    private:
    using _timer = chrono::time_point<chrono::system_clock>;
    _timer start, end; bool check;
    void gettime(_timer& time) { time = chrono::system_clock::now(); }
};

struct _ini { _ini() { ios::sync_with_stdio(false); cin.tie(nullptr); } } _ini;

int main() {
    {
        _time time(disable);
        _i64 n, ans;
        while(cin >> n) {
            ans = 0;
            _rep(a, 10) {
                if(a > n) { break; }
                _rep(b, 10) {
                    if(a + b > n) { break; }
                    _rep(c, 10) {
                        if(a + b + c > n) { break; }
                        if(a + b + c <= n && n <= a + b + c + 9) { ++ans; }
                    }
                }
            }
            cout << ans << endl;
        }
    }
    return 0;
}

C++: #include <cstdio>

int main() {
    int n;
    while ( scanf("%d", &n) != EOF ) {
          int x = 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 ) {
                               x++;
                          }
                      }
                  }
              }
          }
          printf("%d\n", x);
    }
    return 0; 
}

C++: #include <bits/stdc++.h>

using namespace std;

int main(){
int n;int ans(0);
cin>>n;
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 n;
	cin >> n;
	int root[5][50],i,j;
	for(i=0;i<5;i++){
		for (j = 0; j < 50; j++)
			root[i][j] = 0;
	}
	for (i = 0; i<10; i++) {
		root[1][i] = 1;
	}
	for (i = 1; i<5; i++) {
		root[i][0] = 1;
	}
	for(i = 2; i < 5; i++){
		for(j= 1;j<50;j++){
			for (int k = j; k >= 0&&k > j-10;k--) {
				root[i][j] += root[i - 1][k];
			}
		}
	}

	cout << root[4][n] << endl;
}

C++: #include<iostream>

using namespace std;

int main(){
	int n, count=0;
	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) count++;
				}
			}
		}
	}
	cout << count << endl;
	return 0;
}

C++: #include <iostream>
using namespace std;
int main() {
  int n;
  while (cin >> n) {
    int sum = 0;
    int cnt = 0;
    for (int a = 0; a < 10; ++a) {
    sum += a;
    for (int b = 0; b < 10; ++b) {
    sum += b;
    for (int c = 0; c < 10; ++c) {
    sum += c;
    for (int d = 0; d < 10; ++d) {
    sum += d;
    if (sum == n) cnt++;
    sum -= d;
    }
    sum -= c;
    }
    sum -= b;
    }
    sum -= a;
    }
    cout << cnt << endl;
  }
  return 0;
}

C++: #include <iostream>

using namespace std;

int main(void) {
  int n = 0;
  cin >> n;

  int 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 == n) num++;
        }
      }
    }
  }

  cout << num << '\n';

  return 0;
}