Go: package main

import (
        "fmt"
)

func main() {
        var n int
        for {
                _, err := fmt.Scanf("%d", &n)
                if err != nil {
                        break
                }
                cnt := 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 {
                                                        cnt++
                                                }
                                        }
                                }
                        }
                }
                fmt.Printf("%d\n", cnt)
        }
}

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;
}

C++: #include <stdio.h>
#include <iostream>
#include <math.h>

int main(){
  int n, num;
  
  while(scanf("%d", &n)!=EOF){
    num = 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) num++;
          }
        }
      }
    }
    std::cout << num << std::endl;
  }
  
  return 0;
}

C++: #include<iostream>
using namespace std;
int main() {
	int a, b;
	while (cin >> a ) {
		b = 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 == a){
								cout << i << j << k << l << endl;
								b = b + 1;
						}
					}
				}
			}
		}
		cout << b << endl;
	}
}

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

using namespace std;


int main(void)
{
	int n = 0;

	while (scanf("%d" , &n) && n != EOF)
	{
		int ans = 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 (n == i + j + k + l)
						{
							ans++;
						}
					}
				}
			}
		}

		cout << ans << endl;
	}

	return 0;
}

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

using namespace std;


// cin >>
// cout <<
int main(){
	int in=0;
	int out=0;
	
	while(cin.eof()!=true){
	    cin >>in;
	    out=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==in){
					    out++;	
					    }	
				    }
			    }
		    }
	    }
	    	cout <<out<<endl;
	}

	
	return 0;
}

C++: #include <iostream>


int countPattern(int n) {
  int count = 0;
  int ni, ij, ijk;
  for (int i = 0; i < 10; i ++) {
    ni = n - i;
    for (int j = 0; j < 10; j ++) {
      ij = ni - j;
      for (int k = 0; k < 10; k ++) {
        ijk = ij - k;
        if (0 <= ijk && ijk <= 9) {
          count ++;
        }
      }
    }
  }
  return count;
}


int main () {
  int n;
  while (std::cin >> n) {
    std::cout << countPattern(n) << std::endl;
  }
  return 0;
}