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++: #define _USE_MATH_DEFINES
#include<iostream>
#include<string>
#include<queue>
#include<cmath>
#include<map>
#include<set>
#include<list>
#include<iomanip>
#include<vector>
#include<random>
#include<functional>
#include<algorithm>
#include<stack>
#include<cstdio>
#include<bitset>
#include<unordered_map>
#include<climits>
#include<fstream>
using namespace std;
///////////////////library zone!!!!!!!!!!!!!!!!!!!!!!!!!!!!
typedef long long ll;
typedef long double ld;
#define all(a) (a).begin(),(a).end()
const ll Mod = 1000000007;
const ll mod = 998244353;
struct H {
	ll x, y;
	bool operator<(const H &b) const {
		if (x != b.x) return x < b.x;
		return y < b.y;
	}
	bool operator>(const H &b) const {
		if (x != b.x) return x > b.x;
		return y > b.y;
	}
	bool operator==(const H &b) const { return x == b.x&&y == b.y; }
	bool operator!=(const H &b) const { return (*this) != b; }
};
struct P {
	ll pos, cost;
	bool operator<(const P &b) const { return cost < b.cost; }
	bool operator>(const P &b) const { return cost > b.cost; }
};
struct B {
	ll to, cost;
};
struct E {
	ll from, to, cost;
	bool operator<(const E &b) const { return cost < b.cost; }
	bool operator>(const E &b) const { return cost > b.cost; }
};
template<typename T, typename U>
void chmin(T &a, U b) {
	if (a > b) a = b;
}
template<typename T, typename U>
void chmax(T &a, U b) {
	if (a < b) a = b;
}
template<typename T>
T max_0(T a) {
	if (a < 0) return 0;
	return a;
}
template<typename T>
T min_0(T a) {
	if (a > 0) return 0;
	return a;
}
ll read() {
	ll u;
	ll k = scanf("%lld", &u);
	return u;
}
ll gcd(ll i, ll j) {
	if (i > j) swap(i, j);
	if (i == 0) return j;
	return gcd(j%i, i);
}
ll mod_pow(ll x, ll n, ll p) {
	ll res = 1;
	while (n > 0) {
		if (n & 1) res = res * x % p;
		x = x * x % p;
		n >>= 1;
	}
	return res;
}//x^n%p
const ll Inf = 3023372036854775807;
const int inf = 1500000000;
#define int long long
//----------------------------------------------------
signed main() {
	int n;
	while (cin >> n) {
		int ans = 0;
		for (int i = 0; i < 10; i++) {
			for (int j = 0; j < 10; j++) {
				for (int x = 0; x < 10; x++) {
					for (int y = 0; y < 10; y++) {
						if (i + j + x + y == n) {
							ans++;
						}
					}
				}
			}
		}
		cout << ans << endl;
	}
}

C++: ??£??£???

C++: #include<iostream>

using namespace std;

#define MAX 256

int kai (int x){
	if(x == 1 || x == 0)return 1;
	return x * kai(x - 1);
}

int miku(int x){
	if(x > 36)return 0;
	if(x < 10)return kai(x + 3) / ( kai(x) * 6);
	if(x > 19)return miku(36 - x);
	if(x > 9 && x < 19)return kai(x + 3) / ( kai(x) * 6) - (miku(x - 10) * 4);
}

int main(void){
	int n,i = 0;
	int ans[MAX];
	
	while((n = cin.get()) != EOF){
		ans[i] = miku(n);
		i++;
	}
	
	for(int j = 0;j < i;j++){
		cout << ans [j] <<endl;
	}

	return 0;
}

C++: #include <iostream>

using namespace std;

int main(void){
	int n,a[4],count;

	while(cin >> n){
		count=0;
		for(a[0]=0;a[0]<10;a[0]++)
			for(a[1]=0;a[1]<10;a[1]++)
				for(a[2]=0;a[2]<10;a[2]++)
					for(a[3]=0;a[3]<10;a[3]++)
						if(a[0]+a[1]+a[2]+a[3]==n){
							count++;
							break;
						}
		cout << count << endl;
	}

	return 0;
}

C++: #include <iostream>
using namespace std;
int main(){
  int n,cnt = 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)cnt++;
	}
      }
    }
  }
  cout << cnt << endl;
}

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

struct C { int a, b, c, d; };

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());
}

C++: #include<cstdio>
int main(void){
	int n;
	int a,b;
	int s;
	while (scanf("%d", &n) != EOF){
		s = 0;
		for (int i = 0; i < 19; i++){
			if (n - 18 <= i&&i <= n){
				if (i < 9)a = i + 1;
				else a = 19 - i;
				if (n < i + 9)b = n - i + 1;
				else b = 19 + i - n;
				s = (a*b) + s;
			}
		}
		printf("%d\n", s);
	}
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int n;
int main() {
	while(cin >> n) {
		int ret = 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) ret++;
					}
				}
			}
		}
		cout << ret << endl;
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

int main(){
	int a, b, c, d, n;
	int x = 0;
	
	while(cin >> n){
		for(int i = 1;i <10;i++){
			for(int j = 1; j < 10; j++){
				for(int k = 1; k < 10; k++){
					for(int l = 1; l < 10; l++){
						if(i + j + k + l == n){
							x++;
						}
					}
				}
			}
		}
		cout << x << endl;
	}
	
	return 0;
}

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

int main(){
int n;
while(~scanf("%d",&n)){
int res = 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) res++;
}

printf("%d\n",res);
}

C++: #include <iostream>

using namespace std;

int main() {
    int n;
    while (!cin.eof()) {
        int 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++) {
                    int d = n-i-j-k;
                    if (0 <= d && d < 10) {
                        count++;
                    }
                }
            }
        }
        cout << count << endl;
    }
    return 0;
}

C++: #include<cstdio>
#include<algorithm>
#include<memory.h>
#include<string>
using namespace std;

int DP[10][100];
int N;

int main()
{
	while(scanf("%d",&N)!=EOF)
	{
		memset(DP,0,sizeof(DP));
		DP[0][0]=1;
		for(int i= 0;i<=4;i++)
		{
			for(int j=0;j<=N;j++)
			{
				for(int k=0;k<10;k++)
				{
					DP[i+1][j+k]+=DP[i][j];
				}
			}
		}
		printf("%d\n",DP[4][N]);
	}

}

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