Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func nextString() string {
	scanner.Scan()
	return scanner.Text()
}

func nextInt() (int, error) {
	return strconv.Atoi(nextString())
}

func main() {
	scanner.Split(bufio.ScanWords)

	counts := map[int]int{}
	for i := 0; i < 10; i++ {
		for j := 0; j < 10; j++ {
			for k := 0; k < 10; k++ {
				for l := 0; l < 10; l++ {
					s := i + j + k + l
					if s <= 50 {
						counts[s]++
					}
				}
			}
		}
	}
	// fmt.Println(counts)
	for {
		n, err := nextInt()
		if err != nil {
			break
		}
		cnt, ok := counts[n]
		if ok {
			fmt.Println(cnt)
		} else {
			fmt.Println(0)
		}
	}
}

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cstring>
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <list>
#include <stack>
#include <queue>
#include <algorithm>
#include <complex>
#include <iterator>
using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;

#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
#define tr(c, i) for(auto i = (c).begin(); i != (c).end(); i++)
#define rtr(c, i) for(auto i = (c).rbegin(); i != (c).rend(); i++)
#define repfn(i, a, cont, next) \
  for(auto i = (a); [=](){return(cont);}(); i = [=](){return(next);}())
#define repby(i, a, b, step) repfn(i, a, i < b, i + step)
#define repab(i, a, b) repby(i, (a), (b), 1)
#define rep(i, n) repab(i, 0, (n))
#define pb push_back
#define sz(c) int((c).size())

int main(int argc, char **argv)
{
  int n;
  vi v;
  typedef tuple<int, int, int, int> ti4;
  set<ti4> accm;

  while (cin >> n) {
    repab (a, 0, 10) {
      repab (b, 0, 10) {
        repab (c, 0, 10) {
          repab (d, 0, 10) {
            if (a + b + c + d == n) {
              accm.insert(ti4(a, b, c, d));
            }
          }
        }
      }
    }
    cout << sz(accm) << endl;
    accm.clear();
  }
  return 0;
}

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

int main(){
  int n;
  while(cin >> n){
    int a = 0, b = 0, c = 0, d = 0, m = 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) m++;
	  }
	}
      }
    }
  }

  cout << m << endl;

  return 0;
}

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
static const double EPS = 1e-5;
typedef long long ll;
#define FOR(i,n) for(i=0;i<n;i++)
#define rep(i,n) for(int i=0;i<n;i++)

int main(){
	int n;
	for(;cin>>n;){
		int r=0;
		rep(a,10)rep(b,10)rep(c,10)rep(d,10)
			if(a+b+c+d==n)r++;
		cout<<r<<endl;
	}
	return 0;
}

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

int main() {
	int n;
	while(scanf("%d",&n)!=EOF){
		int ans=0;
		for(int i=0;i<10;i++){
			for(int j=0;j<10;j++){
				for(int k=0;k<10;k++){
					int l=n-i-j-k;
					if(0<=l&&l<=9)ans++;
				}
				
			}
		}
	cout << ans << endl;
	}

	
	
    	// your code goes here
	return 0;
}

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

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

C++: #include <iostream>

using namespace std;

int main(void){
	int val;
	while(cin >> val)
		cerr << val << endl;

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	int n;
	while(cin >>n){
		int f = 0;
		for(int a=0; a<10; a++){
			for(int b=0; b<10; b++){
				for(int c=0; c<10; c++){
					if(n-a-b-c>=0 && n-a-b-c<=9){f++;}
				}
			}
		}
		cout <<f<<endl;
	}
	return 0;
}

C++: #include <cstdio>

int main() {
	int a, b, c, d, n, cnt = 0;
	while (scanf("%d", &n) != EOF) {
		cnt = 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)cnt++;
					}
				}
			}
		}
		printf("%d\n",cnt);
	}
	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 <iostream>

using namespace std;

int main() {
    int ans[51] = {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)
                    ans[a + b + c + d] ++;

    int n;
    while (cin >> n) {
        cout << ans[n] << endl;
    }
    return 0;
}

C++: #include<iostream>

using namespace std;
int combine(int *a){
	int max = 0,i = a[0],s=1,j;
	for(j=1;j<4;j++){
		if(i==a[j]){
			s++;
			continue;
		}
		else{
			max = max>s?max:s;
			s=1;
			i = a[j];
		}
	}
	max = max>s?max:s;
	max = 4-max;
	if(max==0)
	return 1;
	else if(max==1)	return 4;
	else if(max==2)	return 6;
	else return 1;
}
int main(){
	int n;
	while(cin>>n){
		int a[4],k=0;
		int left = n/2,right = n-left;
		a[0] = left/2;
		a[1] = left-a[0];
		a[2] = right/2;
		a[3] = right-a[2];
		for(;a[0]>=0;a[0]--){
			for(;a[1]>=0;a[1]--){
				for(;a[2]<=9;a[2]++){
					for(;a[3]<=9;a[3]++){
						int sum = a[0]+a[1]+a[2]+a[3];
						if(sum==n){
							k += combine(a);
						}
					}
				}
			}
		}
		cout<<k<<endl;
	}
	return 0;
}

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

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

C++: #include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
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 <cstdio>
#include <algorithm>

using namespace std;

int main() {

	int N,i,j,k,l,count=0;

	while (cin >> N) {
		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)
							count++;
					}
				}
			}
		}
		cout << count << endl;
		count = 0;
	}
	
	return 0;

}

C++: #include<bits/stdc++.h>

using namespace std;

main(){
		int l;
		while(cin>>l){
			int o=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==l){
								o=o+1;
							}
						}
					}
				}
			}
			printf("%d\n",o);
		}
}

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

int main()
{
	int n;
	while (cin>>n)
	{
		int combo = 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)
					++combo;
			}
			}
			}
		}
		cout<<combo<<endl;
	}
	return 0;
	cin.get();
	getch();
}