Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var scanner = bufio.NewScanner(os.Stdin)

func nextString() string {
	scanner.Scan()
	return scanner.Text()
}

func nextInt() (int, error) {
	return strconv.Atoi(nextString())
}

func main() {
	scanner.Split(bufio.ScanWords)

	counts := map[int]int{}
	for i := 0; i < 10; i++ {
		for j := 0; j < 10; j++ {
			for k := 0; k < 10; k++ {
				for l := 0; l < 10; l++ {
					s := i + j + k + l
					if s <= 50 {
						counts[s]++
					}
				}
			}
		}
	}
	// fmt.Println(counts)
	for {
		n, err := nextInt()
		if err != nil {
			break
		}
		cnt, ok := counts[n]
		if ok {
			fmt.Println(cnt)
		} else {
			fmt.Println(0)
		}
	}
}

C++: #include<stdio.h>
#include<math.h>
#include<string.h>
int main()
{   
    int x;
    int i;
    int a, b, c, d;
    while (scanf("%d", &x) != EOF) {
        i = 0;
        a = 9;
        b = 9;
        c = 9;
        d = 9;
        for (a = 9; a >= 0;a--) {
            for (b = 9;b >= 0; b--) {
                for (c = 9;c >= 0; c--) {
                    for (d = 9;d >= 0 ;d--) {
                        if ((a + b + c + d) == x) {
                            i += 1;
                        }
                    }
                }
            }
        }
        printf("%d\n", i);
    }
    return 0;
}

C++: #include<iostream>

int main(){
	int a=0,b=0,c=0,d=0,n,i,ans=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)
						ans++;
				}
			}
		}
	}

	std::cout<<ans;
	return 0;
}

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

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

C++: #include <iostream>

void main()
{
	int n;
	while( std::cin >> n )
	{
		int num = 0;
		for( int i1=0; i1<=9; ++i1 )
		{
			for( int i2=0; i2<=9; ++i2 )
			{
				for( int i3=0; i3<=9; ++i3 )
				{
					for( int i4=0; i4<=9; ++i4 )
					{
						num += i1+i2+i3+i4 == n;
					}
				}
			}
		}

		std::cout << num;
	}
}

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

using namespace std;

#define llong long long 
int n;
int ans;
bool memo[1001];

void solve(int num, int sum, int d){
	if(d == 4){
		if(sum == num){
			ans++;			
		}
		return;
	}

	if(num < sum) return;

	for(int i = 0;i <= 9; i++){
		solve(num, sum + i, d + 1);
	}
	return;
}

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

	return 0;
}

C++: #include <math.h>
#include <iostream>
#include <ios>
#include <iomanip>
#include <algorithm>
#include <functional>
#include <string>

#define YES "YES"
#define NO "NO"
#define space ' '

using namespace std;

void func();

int main(void)
{
	
	func();

	return 0;
}


void func()
{
	int n, cnt = 0;

	while (cin >> n, !cin.eof()){


		for (int i = 0; i++ < 9;)
		{
			for (int ii = 0; ii++ < 9;)
			{
				for (int iii = 0; iii++ < 9;)
				{
					for (int iiii = 0; iiii++ < 9;)
					{
						if (i + ii + iii + iiii == n)
							cnt++;

					}
				}
			}
		}

		cout << cnt << endl;
	}
}

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

int main() {
	int n, a, b, c, d, ways;
	while (cin >> n) {
		ways = 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) ways++;
					}
				}
			}
		}

		cout << ways << endl;
	}
}

C++: #include <iostream>
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>

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

	while (std::cin >> n) {
		m = 0;
		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) {
							++m;
						}
					}
				}
			}
		}
		std::cout << m << std::endl;
	}
	return 0;
}

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

int sum( int num ){

  int count = 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++;
	  }
	}
      }
    }
  }

  return count;

}

int main(){

  int num;

  while( cin >> num ){
    cout << sum(num) << endl;
  } 

  return 0;
}

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

int main(void){

	while (true){
		int n, count=0;
		cin>>n;
		if (cin.eof()) break;	
		for (int i1=0; i1<10; i1++){
			int n1 = n-i1;
			if (n1 < 0 || n1 > 27) continue;
			for (int i2=0; i2<10; i2++){
				int n2 = n1 - i2;
				if (n2 < 0 || n2 > 18) continue;
				for (int i3=0; i3<10; i3++){
					int n3 = n2 - i3;
					if (n3<0 || n3>9) continue;
					count++;
				}
			}
		}
		cout<<count<<endl;
	}
	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 <string>
using namespace std;
int main()
{
	int a = 0, b = 0;
	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++;
						}
					}
				}
			}
		}
		cout << b << endl;
	}
	
	return 0;
}

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

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

C++: #include<iostream>

using namespace std;

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

C++: #include <stdio.h>

int main()
{
	int n;
	int i,j,k,l;
	int ans[51];
	for(i = 0; i < 51; i++){
		ans[i] = 0;
	}
	for(i = 0; i < 10; i++){
		for(j = 0; j < 10; j++){
			for(k = 0; k < 10; k++){
				for(l = 0; l < 10; l++){
					ans[i + j + k + l]++;
				}
			}
		}
	}
	scanf("%d",&n);
	if(n < 0){
		printf("0\n");
	}
	printf("%d\n",ans[n]);
	return 0;
}

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

int main()
{
   int n;
   vector<int> r;
   while (scanf("%d",&n) != EOF)
   {
      int count=0;
      for (int a=0; (a<=n && a<10); a++)
      {
	 for (int b=0; (b<=n-a && b<10); b++)
	 {
	    for (int c=0; (c<=n-a-b && c<10); c++)
	    {
	       if (n-a-b-c<10)count++;
	    }
	 }
      }
      r.push_back(count);
   }
   for (int i=0; i<r.size(); i++)
   {
      cout << r[i] << endl;
   }
   return 0;
}