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 <bits/stdc++.h>

using namespace std;

template<typename T> class Polynomial {
private:
  vector<T> val;
	
public:
	Polynomial() {}

	Polynomial(const vector<T>& val) : val(val) {}

	Polynomial(const int n) : val(vector<T>(n, 0)) {}

	Polynomial(const int n, const T val) : val(vector<T>(n, val)) {}

	Polynomial operator+=(const Polynomial& p) {
    for (int i = 0; i < p.size(); ++i) {
      if (int(val.size()) == i) val.emplace_back(p[i]);
      else val[i] += p[i];
    }
		return *this;
	}
  
	Polynomial operator-=(const Polynomial& p) {
    for (int i = 0; i < p.size(); ++i) {
      if (int(val.size()) == i) val.emplace_back(-p[i]);
      else val[i] -= p[i];
    }
		return *this;
	}
  
	Polynomial operator*=(Polynomial p) {
		return *this = *this * p;
	}
  
	Polynomial operator+(const Polynomial& p) const {
		Polynomial res = *this;
		res += p;
		return res;
	}
	
	Polynomial operator-(const Polynomial& p) const {
		Polynomial res = *this;
		res -= p;
		return res;
	}

  // TODO FFT
	Polynomial operator*(Polynomial& p) {
		Polynomial res(size() + p.size());
    for (int i = 0; i < size(); ++i) {
      for (int j = 0; j < p.size(); ++j) {
        res[i + j] += val[i] * p[j];
      }
    }
		return res;
	}
	
  T& operator[](int i) {
    if (i >= int(val.size())) val.resize(i + 1, 0);
    return val[i];
  }

  int size() const {
    return val.size();
  }

  Polynomial identity() const {
    return Polynomial(1, 1);
  }
};

int main() {
  Polynomial<int> poly;
  poly = poly.identity();
  for (int i = 0; i < 4; ++i) poly *= Polynomial<int>(10, 1);

  int n;
  while (cin >> n) cout << poly[n] << endl;
}

C++: #include <iostream>
using namespace std;
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++)for(int m = 0; m < 10; m++) if(i+j+k+l+m==n) ans++;
cout << ans << endl;
}
return 0;
}

C++: #include <stdio.h>

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

C++: #include <stdio.h>

int main(){
	int n,answer;

	while( scanf("%d", &n) !=EOF ){
		answer = 0;
		if(n<=36){
			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){
								answer++;
							}
						}
					}
				}
			}
		}
		printf("%d\n", answer);
	}

	return 0;
}

C++: #include <iostream>

using namespace std;

int main() {

	int n;
	int num[4];
	int count;

	while (cin >> n) {
		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>
using namespace std;

int main(){
	int n,ans;

	while( cin >> n ){
		ans = 0;
		if(n<=36){
			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){
								ans++;
							}
						}
					}
				}
			}
		}
		cout << ans << endl;
	}
}

C++: #include<cstdio>
main(){for(int i,c,k,n,j;scanf("%d",&n)+1;k=0){for(i=0;i<1e4;c=0){for(j=i++;j;j/=10)c+=j%10;c-n?k:k++;}printf("%d\n",k);}}

C++: #include <iostream>
using namespace std;
//typedef long long int lli;

int halfComb[2001]; // 0 to 2000  init with 0

void init() {
  for(int i = 0; i < 1001; i++)
    for(int j = 0; j < 1001; j++)
      halfComb[i+j]++;
}

int main(){
  int cnt;
  int n;

  init();
  
  while(cin >> n) {
    cnt = 0;
    for(int i = 0; i <= n; i++) {
      cnt += halfComb[i] * halfComb[n-i];
    }
    cout << cnt << endl;
  }
  return 0;
}

C++: #include <bits/stdc++.h>
using  namespace std;
#define ll    long long int
#define pai     pair<int,int>
#define vi      vector<int>
#define vd      vector<double>
#define mpi     map<int,int>
#define mps     map<string,int>
#define sti     stack<int>
#define stc     stack<char>
#define sei     set<int>
#define ses     set<string>
#define multii  multiset<int>
#define forn(i,n)    for (int i = 0; i < n; i++)
#define fork(i,k,n)  for (int i = k; i <= n; i++)
#define forkr(i,k,n) for (int i = k; i >= n; i--)


 int main()
{
ll n;
while(cin>>n){
ll c=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){
        c++;
       }
    }
  }
 }
}
cout<<c<<endl;
c=0;
}
}

C++: #include <cstdio>

using namespace std;

int main()
{
  int n;
  while (scanf(" %d ", &n) == 1) {
    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++;}
	  }
	}
      }
    }
    printf("%d\n", c);
  }
}

C++: #include<iostream>
#include<cstdio>
#include<cstring>
#include<iomanip>
#define LL long long
using namespace std;
int dp[55][5];
int dfs(int n, int m){
    int&r = dp[n][m];
    if(r!=-1)return r;
    if(m==0){
        return r=n==0;
    }
    r=0;
    for(int i=0;i<=9;i++){
        if(n>=i){
            r+=dfs(n-i,m-1);
        }
    }
    return r;
}

int main(){
    memset(dp, -1, sizeof(dp));
    int n;
    while(cin>>n){
        cout<<dfs(n,4)<<endl;
    }
    return 0;
}

C++: #include <stdio.h>
#include <srdlib.h>
#include <string.h>

int main( void ){
    int nCount = 0;
    int n[50];
    int m = 0;
    char str[3];
    while( true ){
        gets( str );
        if(( n[m] = atoi(str)) == 0 ) break;
        m++;
    }
    for( int a = 0;a < m+1;a++ ){
    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[a] ) nCount++;
                }
            }
       }
    }
    printf( "%d\n",nCount );
    nCount = 0;
    }
    return 0;
}

C++: #include<iostream>

using namespace std;

int main(){
	int N, a,b,c,d,count=0;
	cin >> N;
	
	for(int i=0; i<10;i++){
		if((N-i)/3 >9) continue;
		for(int j=0; j<10;j++){
			if((N-i-j)/2 > 9) continue;
			for(int k=0; k<10;k++){
				if((N-i-j-k) > 9 || (N-i-j-k)<0) continue;
				//cout << i<< " " << j << " " << k << " "<< N-i-j-k <<endl;
				count++;
			}
		}
	}
	cout << count << endl;
	return 0;
}

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;
  }
}

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

int main(void)
{
    int cnt = 0, n;
    while (cin >> n) {
        cnt = 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)
                            ++cnt;
        cout << cnt << endl;
    }
    return 0;
}