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 ans=0;
int a,b,c,d;
if(n<=36){
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(n==a+b+c+d) {ans=ans+1;}
cout<<ans<<endl;}
else if(n>36){ans=0;
cout<<ans<<endl;}}
return 0;
}

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

int a,b,x;

int mySet(int d){
  for(int i=0;i<10;i++){
    if(d<3){
      mySet(d+1);
    }else if(d==3){
      if(a==x){
      b++;
      }
    }
    a++;
  }
  return a=a-10;
}

int main(void){
  cin>>x;
  mySet(0);
  cout<<b<<endl;
  return 0;
}

C++: #include <iostream>
#define MAX 10
using namespace std;

int num, ans = 0;
int ary[MAX] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

void dfs(int sum, int count) 
{
	if (count == 4 || sum == num) {
		if (sum == num) ans++;
	}else {
		for (int j = 0; j < MAX; j++) {
			dfs(sum+ary[j], count+1);
		}
	}
}

int main(void)
{
	while (cin >> num) {
		ans = 0;
		dfs(0, 0);
		cout << ans << endl;
	}
	
	return 0;
}

C++: 
/*
 * main.cpp
 *
 *  Created on: 2011/04/08
 *      Author: satoki
 *      5:01 ~ 5:09
 */
#include <iostream>
#include <string.h>
using namespace std;

int iN;

bool input() {
  if (scanf("%d", &iN) == EOF) return false;
  return true;
}

int manage() {
  int a, b, c, d, cnt = 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 == iN) cnt++;
        }
      }
    }
  }
  return cnt;
}

int main() {
  while (1) {
    if (!input()) break;
    printf("%d\n", manage());
  }
  return 0;
}

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

int main(){
    int n;
    while(scanf("%d", &n) != EOF){
        int cnt = 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) cnt++;
                    }
                }
            }
        }
    cout << cnt <<endl;
    }
}

C++: 
#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <cmath>
#include <utility>
    
#define ll (long long)
#define REP(i,n) for(int i = 0;i<(int)n;i++)
#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 risi (0.05)

using namespace std;


int main(void)
{
    int a,b,c,d;
    int i,j,k,l;
    int number;
    int answercounter = 0;
    int answerarray[1000] = {0};
    int temp = 0;
    while(cin >> number)
    {
        for(i = 0;i <= 9;i++)
            if(i <= number)
                for(j = 0;j<=9;j++)
                    if(i+j<= number)
                        for(k = 0;k<=9;k++)
                            if(i+j+k <= number)
                                for(l = 0;l<=9;l++)
                                    if((i+j+k+l) == number)
                                        temp++;
        answerarray[answercounter] = temp;
        temp = 0;
        answercounter++;
        
                                        
    }
    REP(i,answercounter)
    cout << answerarray[i] << endl;
    return 0;
}

C++: #include <iostream>
#include <vector>

using namespace std;

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

	int count = 0;
	vector<int> result;
	while(cin >> n){

		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)
							count++;

		result.push_back(count);
		count = 0;
	}

	for(const int& x : result){
		cout << x << endl;
	}


	return 0;
}

C++: #include <iostream>

int n;

bool get_input()
{
//	std::cout << "get_input" << std::endl;
	return (std::cin >> n);
}

// no_use: Â©¦éÌÂ
int solve(int sum, int no_use)
{
//	std::cout << "solve " << "sum: " << sum << "no_use: " << no_use << std::endl;
	if (no_use == 1) {
		if (0 <= sum && sum <= 9) {
			return 1;
		} else {
			return 0;
		}
	} else {
		int ans = 0;
		for (int i = 9; i >= 0; i--) {
			if (sum <= i) continue;
			ans += solve(sum - i, no_use - 1);
		}
		return ans;
	}
}

void output(int ans)
{
	std::cout << ans << std::endl;
}

int main(void)
{
	while (get_input()) {
		output(solve(n, 4));
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

int sum_of_2_integers(int n) {
        int a,b;
        int count = 0;
        for (a=0; a < 10; a++) {
                b = n - a;
                if (b < 0) break;
                if (b <= 9) count++;
        }
        return count;
}

int sum_of_4_integers(int n) {
        int a,b;
        int count = 0;
        for (a=0; a <= 18; a++) {
                b = n - a;
                if (b < 0) break;
                if (b <= 18) {
                        count = count + sum_of_2_integers(a)*sum_of_2_integers(b);
                }
        }
        return count;
}

int main(void) {
        int n;
        while(cin >> n) {
                cout << sum_of_4_integers(n);
                cout << endl;
        }

        return 0;
}

C++: #include<iostream>
#include<math.h>
#include<cstdio>
using namespace std;
int main(){
	while(1){
		int n,cnt=0;
		int a,b,c,d;
		cin>>n;
		if(cin.eof()) {break;}
 		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;
	}
	return 0;	
}

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

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

C++: #include <iostream>
#include <algorithm>

using namespace std;
int main(){
  const int MAX_value = 9;
  const int min_value = 0;
  int n;
  for(int i=0;!cin.eof();i++){
    /*    if(i!=0 && cin.eof()==false) {
      cout << i << "Fin";
      break;
      }*/
    //    cout << " " << i;
    int count =0;
    cin >> n;
    for(int a=min_value;a<MAX_value+1;a++){
      for(int b=min_value;b<MAX_value+1;b++){
	for(int c=min_value;c<MAX_value+1;c++){
	  for(int d=min_value;d<MAX_value+1;d++){
	    //cout << d <<endl;
	    if(a+b+c+d==n){
	      count++;
	    }
	  }
	}
      } 
    }
  cout << count<<endl;
  }
}

C++: #include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  while (cin >> n) {
    int cnt = 0;
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 10; j++) {
        for (int k = 0; k < 10; k++) {
          if (0 <= n - i - j - k && n - i - j - k < 10) cnt++;
        }
      }
    }
    cout << cnt << endl;
  }
}

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

int main(){
	int n, t = 0;
	int out[100] = {0};
	while(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){
							out[t]++;
						}
					}
				}
			}
		}
		t++;
	}
	for(int i = 0; i < t; i++){
		cout << out[i] << endl;
	}
}