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 <algorithm>
#include <bitset>
#include <cassert>
#include <complex>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <memory>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <typeinfo>
#include <utility>
#include <vector>
#include <array>
#include <chrono>
#include <random>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#define INIT std::ios::sync_with_stdio(false);std::cin.tie(0);
#define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__);
template<typename T> void Scan(T& t) { std::cin >> t; }
template<typename First, typename...Rest>void Scan(First& first, Rest&...rest) { std::cin >> first; Scan(rest...); }
#define OUT(d) std::cout<<d;
#define FOUT(n, d) std::cout<<std::fixed<<std::setprecision(n)<<d;
#define SOUT(n, c, d) std::cout<<std::setw(n)<<std::setfill(c)<<d;
#define SP std::cout<<" ";
#define TAB std::cout<<"\t";
#define BR std::cout<<"\n";
#define ENDL std::cout<<std::endl;
#define FLUSH std::cout<<std::flush;
#define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i;
#define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& r:c)for(auto& i:r)std::cin>>i;
#define ALL(a) (a).begin(),(a).end()
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i)
#define REP(i, n) for(int i=0;i<int(n);++i)
#define RREP(i, n) for(int i=(n)-1;i>=0;--i)
#define PAIR std::pair<int, int>
#define IN(a, x, b) (a<=x && x<b)
#define SHOW(d) {std::cout << #d << "\t:" << d << "\n";}
#define SHOWVECTOR(v) {std::cout << #v << "\t:";for(const auto& i : v){std::cout << i << " ";}std::cout << "\n";}
#define SHOWVECTOR2(v) {std::cout << #v << "\t:\n";for(const auto& i : v){for(const auto& j : i){std::cout << j << " ";}std::cout << "\n";}}
#define SHOWPAIRVECTOR2(v) {std::cout << #v << "\t:\n";for(const auto& i : v){for(const auto& j : i){std::cout<<'('<<j.first<<", "<<j.second<<") ";}std::cout << "\n";}}
#define SHOWPAIRVECTOR(v) {for(const auto& i:v){std::cout<<'('<<i.first<<", "<<i.second<<") ";}std::cout<<"\n";}
#define CHECKTIME(state) {auto start=std::chrono::system_clock::now();state();auto end=std::chrono::system_clock::now();auto res=std::chrono::duration_cast<std::chrono::nanoseconds>(end-start).count();std::cerr<<"[Time:"<<res<<"ns  ("<<res/(1.0e9)<<"s)]\n";}
#define SHOWQUEUE(a) {std::queue<decltype(a.front())> tmp(a);std::cout << #a << "\t:";for(int i=0; i<static_cast<int>(a.size()); ++i){std::cout << tmp.front() << "\n";tmp.pop();}std::cout << "\n";}

//#define int ll
using ll = long long;
constexpr int INFINT = 1 << 30;
constexpr ll INFLL = 1LL << 60;
constexpr double EPS = 0.0000000001;
constexpr int MOD = 1000000007;

int main() {
	INIT;
	int n;
	while (std::cin >> n) {
		int cnt = 0;
		REP(i, 10) REP(j, 10) REP(k, 10) {
			int l = n - i - j - k;
			if (IN(0, l, 10)) ++cnt;
		}
		OUT(cnt)BR;
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

void solve()
{
	int n;
	while(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(n == a + b + c + d)
						{
							count++;
						}
					}
				}
			}
		}
		cout << count << endl;
	}
}

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

C++: a

C++: #include <iostream>

using namespace std;

int main()
{
	int i, j, k ,l;
	int n, sum;
	
	while(cin >> n)
	{
		sum = 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++)
					{
						if(n == i + j + k + l)
						{
							sum = sum + 1;
						}
					}
				}
			}
		}
		
		cout << sum << endl;
	}

	return 0;
}

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

using namespace std;

int solve(const int n) {
	set< vector<int> > s;

	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) {
						s.insert({ a,b,c,d });
						break;
					}
	return s.size();
}

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	
	while (cin) {
		int n;
		cin >> n;
		cout << solve(n) << endl;
	}

	return 0;
}

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

using namespace std;

int solve(const int n) {
	set< vector<int> > s;
	vector<int> v(4);

	for (v[0] = 0; v[0] < 10; v[0]++)
		for (v[1] = 0; v[1] < 10; v[1]++)
			for (v[2] = 0; v[2] < 10; v[2]++)
				for (v[3] = 0; v[3] < 10; v[3]++) {
					int sum = 0;
					for (int i = 0; i < 4; i++) sum += v[i];
					if (sum == n) {
						s.insert(v);
						break;
					}
				}
	return s.size();
}

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n;
	while (cin >> n) {
		cout << solve(n) << endl;
	}
	return 0;
}

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

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

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

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

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


int main(){

  int n,a,b,c,d,count;

  while(cin >> n){
    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<iostream>
using namespace std;

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

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

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

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