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 scanf_s scanf
#include <stdio.h>
#include <string>
#include <iostream>
using namespace std;
#define MAX 20
int main(void)
{
	int n, cou;
	int i = 0, j = 0, l = 0, k = 0;
	while (scanf_s("%d", &n) != EOF) {
		for (int i = 0; i <= 9 && i <= n; ++i) {
			for (int j = 0; j <= 9 && i + j <= n; ++j) {
				for (int l = 0; l <= 9 && i + j + l <= n; ++l) {
					for (int k = 0; k <= 9 && i + j + l + k <= n; ++k) {
						if (i + j + l + k == n) ++cou;
					}
				}
			}
		}
		printf("%d\n", cou);
		cou = 0;
	}
}

C++: #include<bits/stdc++.h>
#include<vector>
#include<list>
#include<stack>
#include<queue>
#include<algorithm>
using namespace std;


int main(){
    int n;
    while(scanf("%d",&n)!=EOF){
        int ans=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) ans++;
                    }
                }
            }
        }
    }
    return 0;
}

C++: #include<iostream>
#include<cstdio>
#define a(i,b) for(int i=0;i<b;i++)
using namespace std;
int main() {
    int n,c;
    while(scanf("%d",&n)!=EOF){
    	c=0;
    	a(i,10)a(j,10)a(k,10)a(h,10)if(i+j+k+h==n)c++;
    cout<<c<<endl;
    }
    return 0;
}

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

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

#define ascent(i, a, b) for(int (i) = (a); (i) < (b); (i) ++)

using namespace std;

int main() {
  int tmp;
  vector<int> n;
  while(cin >> tmp) {
    n.push_back(tmp);
  }

  ascent(i, 0, n.size()) {
    int ans = 0;
    ascent(a, 0, 10) {
      ascent(b, 0, 10) {
	ascent(c, 0, 10) {
	  ascent(d, 0, 10) {
	    if(a + b + c + d == n[i]) {
	      ans ++;
	    }
	  }
	}
      }
    }
    cout << ans << endl;
  }
  
  return 0;
}

C++: #include<stdio.h>

int main()
{
int n,con;
con=0;
while(scanf(" %d",&n)!=EOF)
{
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)con++;
printf("%d\n",con);
con=0;
}
return 0;

}

C++: #include <iostream>

using namespace std;

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

for(int j=0;j<5;j++){
cin>>n;

    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<stdio.h>
#include<math.h>

int main()
{
	int n, a, b, c, d, cnt = 0;
	while (scanf("%d", &n) != EOF)
	{
		cnt = 0;
		if (n > 36)
		{
			printf("0\n");
			continue;
		}
		for (a = 0; a < 10; a++)
		{
			if (n - a>27)continue;
			for (b = a; b < 10; b++)
			{
				if (n - a - b > 18)continue;
				for (c = b; c < 10; c++)
				{
					if (n - a - b - c > 9)continue;
					for (d = c; d < 10; d++)
					{
						if (a + b + c + d == n)
						{
							if ((a == b) && (a == c) && (a == d))cnt++;
							else if (((a == b) && (b == c)) | ((b == c) && (c == d)))cnt += 4;
							else if ((a == b) | (b == c) | (c == d))cnt += 12;
							else cnt += 24;
						}
					}
				}
			}
		}

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

C++: #include<iostream>
#include<cstdio>
#include<sstream>
#include<fstream>
#include<vector>
#include<list>
#include<stack>
#include<queue>
#include<deque>
#include<map>
#include<set>
#include<algorithm>
#include<string>
#include<cmath>
#include<cstdlib>
using namespace std;

int main(){
	int n;
	while(scanf("%d",&n)==1){
	int tot = 0;
	for(int i=0;i<10;++i){
		for(int j=0;j<10;j++){
			for(int k=0;k<10;++k){
				for(int w=0;w<10;++w){
					if(i+j+k+w==n){
						++tot;
					}
				}
			}
		}
	}
	cout<<tot<<endl;
	}
	return 0;
}

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

int main() {
    int n;
    int ans;
    while(cin >> n){
        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>
using namespace std;
#define rep(i,n) for(i = 0;i < n;i++)
int main(){
	int n,i,j,k,l;
	int count[200] = {0},cor = 0;
	while(cin >> n){
		rep(i,10){
			rep(j,10){
				rep(k,10){
					rep(l,10){
						if(n == i+j+k+l)
							count[cor]++;
					}
				}
			}
		}
		cor++;
	}
	rep(i,cor){
		cout << count[i] << endl;
	}
	return 0;
}

C++: #include <iostream>
int main()
{
  int n;
  while (std::cin >> n) {
    int r = 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) {
              r++;
            }
          }
        }
      }
    }
    std::cout << r << std::endl;
  }
}

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, n != EOF){
		ans = 0;
		solve(n, 0, 0);
		cout << ans << endl;
	}

	return 0;
}

C++: #include <stdio.h>
int main()
{
int a,b,c,d,n;
int i,j,k,l;
int ans=0;
while(scanf("%d",&n) != EOF){
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(i+j+k+l == n)
ans++;
}
}
}
}
printf("%d\n",ans);
ans = 0;
}
return 0;
}

C++: #include <iostream>

auto main () -> int
{
    int n;
    while (std::cin >> n)
    {
        int res = 0;
        for (auto a = 0; a < 10; ++ a)
        {
            for (auto b = 0; b < 10; ++ b)
            {
                for (auto c = 0; c < 10; ++ c)
                {
                    auto d = n - a - b - c;
                    if (0 <= d && d < 10)
                    {
                        ++ res;
                    }
                }
            }
        }
        std::cout << res << std::endl;
    }
}

C++: #include <iostream>
using namespace std;
int main(){
	int n,a,b,c,d;
	int k,l,m,ans=0;
	cin>>n;
	for(a=0;a<min(10,n);a++){
		k = n-a;
		for(b=0;b<min(10,k);b++){
			l = k-b;
			for(c=0;c<min(10,l);c++){
				m = l-c;
				if(0 <= m && m<10){
					ans++;
				}
			}
		}		
	}
	cout << ans << endl;
}

C++: #include <stdio.h>

using namespace std;


int main(){
	int n,count;
	while(scanf("%d",&n)!=EOF){
		if(n >= 37){
			printf("0\n");
		}else{
			count = 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)count++;
						}
					}
				}
			}
			printf("%d\n",count);
		}
	}

    return 0;
}