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>
#include<algorithm>
#include<vector>
#include<cmath>
#include<cstdio>
#include<string>
typedef long long int ll;


using namespace std;

int main(){
	while(1){
		int n;
		ll sum=0;
		if( !(cin>>n) )break;
		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 )sum++;
					}
				}
			}
		}
		cout<<sum<<endl;
	}
	return 0;
}

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

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

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

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

C++: #include <iostream>

using namespace std;


int main()
{
    int num = 0;
    int cnt = 0;
    
    while (cin >> num)
    {
        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 m = 0; m < 10; m++)
                    {
                        if (num == (i + j + k +m))
                        {
                            cnt++;
                        }
                    }
                }
            }
        }
        
        cout << cnt << endl;
    }
    
    return 0;
}

C++: #include <stdio.h>

int ans[55] = { 0 } ;

void init ( ) ;

int main ( )
{
	int s ;
	init ( ) ;
	while ( scanf ( "%d" , &s ) == 1 ) {
		printf ( "%d\n" , ans[s] ) ;
	}
	return 0 ;
}

void init ( )
{
	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++ ) {
					ans[i+j+k+l]++ ;
				}
			}
		}
	}
}

C++: #include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <algorithm>
#include <sstream>
#include <cmath>
#include <set>
#include <iomanip>
using namespace std;

#define REP(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
#define REMOVE(Itr,n) (Itr).erase(remove((Itr).begin(),(Itr).end(),n),(Itr).end())
#define PB_VEC(Itr1,Itr2) (Itr1).insert((Itr1).end(),(Itr2).begin(),(Itr2).end())
#define UNIQUE(Itr) sort((Itr).begin(),(Itr).end()); (Itr).erase(unique((Itr).begin(),(Itr).end()),(Itr).end())
#define BOUND(Itr,val) lower_bound((Itr).begin(),(Itr).end(),(val))
typedef long long ll;

int main(){
    
    
    
    int ans=0;
    int n;
    while(cin>>n){
    REP(i,10)REP(j,10)REP(k,10)REP(l,10){
        if(i+j+k+l==n)ans++;
    }
    
        
    cout<<ans<<endl;
    
    }
    
    return 0;
}

C++: #include<iostream>
using namespace std;
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++) if(a+b+c+d == n) ans++;
    cout <<ans<<endl;
  }
  return 0;
}

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

/*
inline int factorial(int n)
{
    int x = 1;
    for (;n != 0; n--)
        x *= n;
    return x;
}

inline int factorial(int s, int n)
{
    int x = 1;
    for (;n > s; n--)
        x *= n;
    return x;
}

inline int conbination(int n, int r)
{
    return factorial(n - r, n) / factorial(r);
}

inline int homogeneous(int n, int r)
{
    return conbination(n + r - 1, r);
}
*/

int calc(int n, int k)
{
    if (k == 0)
        if (n == 0)
            return 0;
        else
            return 1;

    for (int i = 0; i <= 9; i++) {
        n -= i;
        if (n < 0)
            return 0;
        else
            return calc(n, k - 1);
    }

}

int main()
{
    for (int n; cin >> n;)
        cout << n << " " << calc(n, 4) << 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++: #pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>

using namespace std;
using Int = long long;
typedef pair<int,int> Pi; typedef pair<Int,Int> Pl;
constexpr int mod = 1e9+7;
constexpr int INF32 = numeric_limits<int>::max();
constexpr Int INF64 = numeric_limits<Int>::max();
#define END {cout<<ans<<'\n'; return 0;}
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
#define mp make_pair
#define eb emplace_back
#define Pr(t) priority_queue<t>
#define gPr(t) priority_queue<t,vector<t>,greater<t>>
#define V(t) vector<t>
#define rer(i,l,r) for(int(i)=(l); (i)<(r); ++(i))
#define rep(i,n) rer(i,0,n)
#define gnr(i,l,r) for(int (i)=(r)-1; (i)>=(l); --(i))
#define pri(a) cout<<(a)<<'\n'
#define pri2(a,n) {rep(i,n-1)cout<<a[i]<<' '; if(n)cout<<a[n-1]<<'\n';}
#define prip(p) cout<<(p).fi<<' '<<(p).se<<'\n'
template<class T> inline bool cmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool cmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

int n,m,_,x,y,q;
string s,sb;
bool ok;
char cf,cb;

int main(){
  cin.tie(nullptr); ios::sync_with_stdio(0);
  //cout<<fixed<<setprecision(20);
  
  while(cin>>n){
    int ans=0;
    rep(i,10)rep(j,10)rep(k,10)if(i+j+k<=n&&n-(i+j+k)<10)ans++;
    pri(ans);
  }
}

C++: #include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<string>
#include<algorithm>
#include<vector> 
#include<limits>
#include<numeric>
#include<math.h>
using namespace std;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define in(x) cin >> x
#define out(str) cout << str << endl

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int N,ans;

int main(){
    while(cin>>N){
        ans=0;
        rep(i,10){
            rep(j,10){
                rep(k,10){
                    rep(l,10){
                        if(i+j+k+l==N)ans++;
                    }
                }
            }
        }
        out(ans);
    }
}

C++: #include <iostream>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);++i)
int main(){
	int n,a,ans=0;
	while(cin >> n){
		rep(i,10){
			rep(j,10){
				rep(k,10){
					a=n-i-j-k;
					if(a>=0 && a<10){
						ans++;
					}
				}
			}
		}
		cout << ans << endl;
		ans = 0;
	}
}

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

int main(){
  int a,b,c,d,e,n,ans=0;
  cin >> n;
  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)
            ans++;
        }
        cout << ans << endl;
}