Go: package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)

	for scanner.Scan() {
		count := 0
		for i := 9; i >= 0; i-- {
			numCpy, _ := strconv.Atoi(scanner.Text())
			if numCpy-i >= 0 {
				for j := 9; j >= 0; j-- {
					numCpyi := numCpy - i
					if numCpyi-j >= 0 {
						for k := 9; k >= 0; k-- {
							numCpyj := numCpyi - j
							if numCpyj-k >= 0 {
								for l := 9; l >= 0; l-- {
									numCpyk := numCpyj - k
									if numCpyk-l == 0 {
										count++
										break
									}
								}
							}
						}
					}
				}
			}
		}
		fmt.Println(count)
	}

}

C++: #include<iostream>
using namespace std;
int main()
{
  int n;
  int cnt = 0;

  while(scanf("%d",&n) != EOF){

    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;
	while (cin>>n){
		int 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;
	}
	return 0;
}

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

using namespace std;

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

C++: #include<iostream>
#include<stdio.h>
int main(){
	int a,b,c,d,n,i;

	std::cin>>n;
	i=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){
						i++;
			

						}
					}
				}
			}
		}
	std::cout<<i<<std::endl;

	system("pause");
	return 0;
	}

C++: #include<iostream>

using namespace std;
#define RENT 100000
int main(){
	int n, ans;
	int counter = 0;
	while (cin >> n){
		for (int i = 0; i < 10; i++){
			for (int q = 0; q < 10; q++){
				for (int w = 0; w < 10; w++){
					for (int e = 0; e < 10; e++){
						ans = i + q + w + e;
						if (ans == n){
							counter += 1;
						}
					}
				}
			}
		}
		cout << counter << endl;
	}
}

C++: #include <stdio.h>
#include <stdlib.h>

int main(void)
{
	int n;
	char buf[256];
	
	
	while (fgets(buf, 256, stdin){
		
		n = atoi(buf);
		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++;
						}
					}
				}
			}
		}
		printf("%d\n", ans);
	}
	
	return (0);
}

C++: #include <stdio.h>

int main(void)
{
    int i,j,k,l,n,cnt;
    while(scanf("%d",&n)==1){
        cnt = 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(n==(i+j+k+l))cnt++;
        printf("%d\n",cnt);
    }
    return 0;
}

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

void solve(int n) {
	int a, b, c, d, ans = 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) ans++;
				}
			}
		}
	}
	printf("%d\n", ans);
}

int main() {
	int n;
	while (n != NULL) {
		cin >> n;
	}
	return 0;
}

C++: #include<iostream>
using namespace std;int main(){for(int i,c,k,n,j;cin>>n;k=0){for(i=0;i<1e4;c=0){for(j=i++;j>0;j/=10)c+=j%10;c-n?k:k++;}cout<<k<<endl;}}

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

int main(void) {
	int a[50];
	for (int i = 0; i < 50; i++) {
		while (cin >> a[i]) {
			int ans = 0;
			for (int x = 0; x < 10; x++) {
				for (int y = 0; y < 10; y++) {
					for (int z = 0; z < 10; z++) {
						for (int w = 0; w < 10; w++) {
							if (a[i] - x - y - z - w == 0) ans++;
						}
					}
				}
			}
			cout << ans << endl;
		}
	}
	return 0;
}

C++: #include<iostream>
using namespace std;
int dp[40];
int main(){
    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++){
                    dp[i+j+k+l]++;
                }
            }
        }
    }
    int n;
    while(cin>>n){
        if(n==0){break;}
        cout<<dp[n]<<endl;
    }
    return 0;
}

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

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<iomanip>
using namespace std;
#define pi 3.141592653589793283462
int main(){
    int c;
	int d=0;
	while (cin>>c)
	{
		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==c)
						   d++;
					}
				}
			}
		}
	}
	cout<<d<<endl;
	return 0;
}

C++: #include <iostream>
#include <string>
#include <stack>
#include <math.h>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <vector>

using namespace std;





int main()
{
	int n;
	int sum;
	int k[19];//k[i]???i?????????????¶?????????§??????????????¨?????????????????????
	while (cin >> n) {
		sum = 0;
		if (n > 36) {
			cout << "0" << endl;
		}
		else{
			
			for (int i = 0; i < 19; i++) {
				if (i < 10) {
					k[i] = i + 1;
				}
				else {
					k[i] = 19 - i;
				}
			}
			for (int i = max({0,n-18}); i <= min({ 18,n }); i++) {
				sum += k[i] * k[n - i];
			}
			cout << sum << endl;
		}
		
	}





}

C++: // clang-format off
#include <bits/stdc++.h>
#define int long long
#define main signed main()
// #define main int main()
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define prec(n) fixed << setprecision(n)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
using namespace std;
using pii = pair<int, int>;
using vi = vector<int>;
using vd = vector<double>;
using vc = vector<char>;
using vb = vector<bool>;
using vs = vector<string>;
using vpii = vector<pii>;
using vvi = vector<vi>;
using vvb = vector<vb>;
using vvpii = vector<vpii>;
template<typename A> using fn = function<A>;
constexpr int INF = sizeof(int) == sizeof(long long) ? 1000000000000000000LL : 1000000000;
constexpr int MOD = 1000000007;
constexpr double PI = acos(-1);
template<typename A, typename B> bool cmin(A &a, const B &b) { return a > b ? (a = b, true) : false; }
template<typename A, typename B> bool cmax(A &a, const B &b) { return a < b ? (a = b, true) : false; }
constexpr bool odd(const int &n) { return n & 1; }
constexpr bool even(const int &n) { return !odd(n); }
template<typename V> constexpr typename V::value_type sum(const V &v) { return accumulate(all(v), 0); }
void solve();
main { solve(); return 0; }
// clang-format on

void solve() {
  int n;
  while (cin >> n) {
    int s = 0;
    rep(a, 10) rep(b, 10) rep(c, 10) rep(d, 10) {
      s += a + b + c + d == n;
    }
    cout << s << endl;
  }
}

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() {
   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;
   }

   return 0;
}