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<iostream>
using namespace std;
int main()
{
	int n,t=0;
	cin>>n;
	if(n<=36){
	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){
						t++;
						
					}
					
					cout<<t<<endl;
	}
					return 0;
}

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

template<class T> inline void YES(T condition){ if(condition) cout << "YES" << endl; else cout << "NO" << endl; }
template<class T> inline void Yes(T condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }
template<class T> inline void POSS(T condition){ if(condition) cout << "POSSIBLE" << endl; else cout << "IMPOSSIBLE" << endl; }
template<class T> inline void Poss(T condition){ if(condition) cout << "Possible" << endl; else cout << "Impossible" << endl; }
template<class T> inline void First(T condition){ if(condition) cout << "First" << endl; else cout << "Second" << endl; }
int character_count(string text, char character){ int ans = 0; for(int i = 0; i < text.size(); i++){ ans += (text[i] == character); } return ans; }
long power(long base, long exponent, long module){ if(exponent % 2){ return power(base, exponent - 1, module) * base % module; }else if(exponent){ long root_ans = power(base, exponent / 2, module); return root_ans * root_ans % module; }else{ return 1; }}
struct position{ int y, x; }; position move_pattern[4] = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}}; // double euclidean(position first, position second){ return sqrt((second.x - first.x) * (second.x - first.x) + (second.y - first.y) * (second.y - first.y)); }
template<class itr, class func> void array_output(itr start, itr goal, func out = [](itr x) { return x; } ){ string ans; for(auto i = start; i != goal; i++){ ans += to_string(*i) + " "; } ans.pop_back(); cout << ans << endl; }
template<class itr, class func> void nint_output(itr start, itr goal, func out = [](itr x) { return x; } ){ string ans; for(auto i = start; i != goal; i++){ ans += string(out(*i)) + " "; } ans.pop_back(); cout << ans << endl; }
long gcd(long a, long b){ if(a && b){ return gcd(min(a, b), max(a, b) % min(a, b)); }else{ return a; }}
#define mod long(1e9 + 7)
#define all(x) (x).begin(), (x).end()
#define bitcount(n) __builtin_popcount(n)

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++){
                        ans += (a + b + c + d == n);
                    }
                }
            }
        }
        cout << ans << endl;
    }
}

C++: #include <cstdio>
#include <set>
#include <tuple>

int main() {
    int n;
    std::set<std::tuple<int, int, int, int>> s;
    while (~scanf("%d", &n)) {
        for (int a = 0; a < 10 && a <= n; ++a) {
            for (int b = 0; b < 10 && a + b <= n; ++b) {
                for (int c = 0; c < 10 && a + b + c <= n; ++c) {
                    for (int d = 0; d < 10 && a + b + c + d <= n; ++d) {
                        if (a + b + c + d == n) {
                            s.insert(std::make_tuple(a, b, c, d));
                        }
                    }
                }
            }
        }
        printf("%lu\n", s.size());
        s.clear();
    }
}

C++: #include <iostream>

const int N = 9;

int main(void) {
  int n = 0;

  while (scanf("%d", &n) != EOF) {
    int count = 0;
    
    for (int i = 0; i <= N; i++) {
      for (int j = 0; j <= N; j++) {
	for (int k = 0; k <= N; k++) {
	  for (int l = 0; l <= N; l++) {
	    if ((i + j + k + l) == n) {
	      count++;
	    }
	  }
	}
      }
    }

    std::cout << count << std::endl;
  }
   
  return 0;
}

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

using ll = long long;
#define debug(x) cerr << #x << ": " << x << endl;
#define line() cerr << "---------------" << endl;

int main() {
   for (int x = 0; x <= 50; x++) {
      int n;
      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++)
               for (int l = 0; l < 10; l++) {
                  if (i+j+k+l == n) {
                     cnt++;
                  }
               }

      cout << cnt << endl;
   }

   return 0;
}

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

int n;

int d[4][61];

int main(void)
{
	

		for(int i = 0; i <= 9; i++)
			d[0][i]++;
		for(int i = 0; i < 3; i++){
			for(int j = 0; j <= 9; j++){
				for(int k = 0; k <= 9*(i+2); k++){
					d[i+1][k+j] += d[i][k];
				}
			}
		}


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

		cout << d[3][n] << endl;
	}


	return 0;
}

C++: #include <iostream>
#include <stdio.h>
using namespace std;
 
int main(){
  int a,b,c,d,n,count = 0;
  while(scanf("%d",&n)!=EOF){
     
    count=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)count++;
    }
      }
    }
    }
    cout << count <<endl;
  }
  return 0;
}

C++: #include<iostream>
int main(){
  int n,a,b,c,d,f;
  while(std::cin>>n){
    f=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)f++;
    std::cout<<f<<"\n";
  }
}

C++: #include<iostream>
int main(){
	int n;
	while(1){
		std::cin>>n;
		if(std::cin.eof())break;
		int e=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)e++;
					}
				}
			}
		}
		std::cout<<e<<std::endl;
	}
	return 0;
}

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

int main() {
	int n;
	while (cin >> n) {
		int num = 0;
		if (n > 36) {
			cout << "0" << endl;
		}
		else {
			for (int i = 0; i < 10; i++) {
				if (i > n) {
					break;
				}
				for (int j = 0; j < 10; j++) {
					if (i + j > n) {
						break;
					}
					for (int k = 0; k < 10; k++) {
						if (i + j + k > n) {
							break;
						}
						for (int l = 0; l < 10; l++) {
							if (i + j + k + l > n) {
								break;
							}
							if (i + j + k + l == n) {
								num++;
							}
						}
					}
				}
			}
		}
		cout << num << endl;
	}
	return 0;
}

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

inline int counter(int n);

int main(){
	int data[50],n,i=0;
	while(std::cin){
		scanf("%d",&n);
		data[i] = counter(n);
		i++;
	}
	for (int j=0;j<i;j++){
		printf("%d\n",data[i]);
	}
}

inline int counter(int n){
	int a,b,c,d,count=0;
	for (int i=0;i<10;++i){
		for (int j=0;j<10;++j){
			for (int l=0;l<10;++l){
				for (int t=0;t<10;++t){
					if (i+j+l+t == n)
						count++;
				}
			}
		}
	}
}

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

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