Go: package main
import (
	"fmt"
	"os"
	"strconv"
	"bufio"
)

var sc = bufio.NewScanner(os.Stdin)

func main(){
	for sc.Scan(){
		n := nextInt()
		cnt := 0
		// 37以上のとき組み合わせは存在しないが省くのめんどくさいのでまとめて計算
		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{
							cnt++
						}
					}
				}
			}
		}
		fmt.Println(cnt)
	}
}

func next()string{
	//sc.Scan()
	return sc.Text()
}

func nextInt()int{
	a, _ := strconv.Atoi(next())
	return a
}

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

#define rep(i,n) for(int i=0; i<n; i++)
int main(){
	int n, ans;
	while(cin >> n){
		ans=0;
		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;
  }
}

C++: #include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<math.h>
#define L(_i,_N) for(int _i=0;_i<_N;_i++)
#define C(_Dis) cout<<_Dis<<endl;

using namespace std;

typedef long long int lli;

int main() {
	int n,Count=0;
	while (cin >> n) {
		L(i, 10)L(j, 10)L(k, 10)L(l, 10)if (i + j + k + l == n) Count++;
		C(Count);
		Count = 0;
	}
	return 0;
}

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

int dp[51];

int main(void)
{

	int n;
	while(cin >> n, !cin.eof()){

		for(int i = 1; i <= n; i++){
			for(int j = 1; i * j <= 50; j++)
				dp[i*j]++;
		}

		cout << dp[n] << endl;

	}


	return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
int main()
{
int n;
while(scanf("%d,"&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++;
}
}
}
}
printf("%d\n",ans);
}
return 0;
}

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

#define rep(i,b) for(int i=0;i<=b;i++)
int main(){int n,r;while(cin>>n){r=0;rep(a,9)rep(b,9)rep(c,9)rep(d,9)if(a+b+c+d==n)r++;cout<<r<<endl;}}

C++: //
//  main.cpp
//  CppTest
//
//  Created by Ryu on 2017/02/08.
//  Copyright ?? 2017??´ Ryu. All rights reserved.
//

#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
using namespace std;

int main(int argc, const char * argv[]) {
    // insert code here...
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int n[50];
    int comb[50];
    int m = 0;
    while (cin >> n[m]) {
        if(n[m] <= 18){
            if (n[m] <= 9) {
                comb[m] = powl(4, n[m]);
            }else{
                comb[m] = powl(4, n[m]);
                for (int i = n[m]; i >= 9; i--) {
                    comb[m] -= powl(3, n[m] - 9) * 4;
                }
            }
        }else if(n[m] <= 36){
            n[m] = 36 - n[m];
            if (n[m] <= 9) {
                comb[m] = powl(4, n[m]);
            }else{
                comb[m] = powl(4, n[m]);
                for (int i = n[m]; i >= 10; i--) {
                    comb[m] -= powl(3, n[m] - i) * 4;
                }
            }
        }else{
            comb[m] = 0;
        }
        m++;
    }
    
    for (int i = 0; i < m; i++) {
        printf("%d\n", comb[i]);
    }
    printf("\n");
    
    return 0;
}

C++: 
//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>
#include <limits>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); }

//math
//-------------------------------------------
template<class T> inline T sqr(T x) { return x * x; }

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define EXISTch(s,c) ((((s).find_first_of(c)) != std::string::npos)? 1 : 0)//cがあれば1 if(1)
#define SORT(c) sort((c).begin(),(c).end())

#define REP(i,n) for(int i=0;i<(int)n;++i)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI = acos(-1.0);
const int INF = (int)1000000007;
const LL MOD = (LL)1000000007;//10^9+7
const LL INF2 = (LL)100000000000000000;//10^18

int 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 k = 0; k < 10; k++) {
					for (int l = 0; l < 10; l++) {
						if (i + j + k + l == n)ans++;
					}
				}
			}
		}
		cout << ans << endl;
	}
	return 0;
}

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

C++: #define _CRT_SECURE_NO_WARNINGS
#define M_PI 3.14159265358979
#include <iostream>
#include <stdio.h>
#include <string>
#include <math.h>
#include<iomanip>
#include<vector>
#include<cmath>
#include <algorithm>

using namespace std;


int main()
{
	int n, counter = 0;
		while (scanf("%d", n) == -1){
		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) counter++;
					}
				}
			}
		}
		cout << counter << endl;
	}
	return 0;
}

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

int main() {
	//a + b + c + d = n
	// 0~9
	int n, cnt;
	while (cin >> n){
		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;
}