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<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<cstdio>
#include<climits>
#include<cmath>
#include<cstring>
#include<string>

#define f first
#define s second
#define mp make_pair

#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++)
#define ALL(c) (c).begin(), (c).end()
#define EPS (1e-10)
using namespace std;

typedef unsigned int uint;
typedef long long ll;

int main(){
  int n;
  while(cin>>n){
    int ans = 0;
    REP(a,10) REP(b,10) REP(c,10){
      int d = n - a - b - c;
      if( d >= 0 && d <= 9) ans++;  
    }
    cout << ans << endl;
  }
  return 0;
}

C++: #include <stdio.h>
int main(){
	int n;
	scanf("%d", &n);
	int result = 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){
						++result;
					}
				}
			}
		}
	}
	printf("%d\n", result);
}

C++: #include<iostream>
using namespace std;
int main()
{
    long n,a,b,c,d,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;
    }
}

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

int saiki(int n, int m, int k){
	if(k==4){
		if(n==m) return 1;
		else return 0;
	}else{
		int sum = 0;
		for(int i=0; i<10; i++){
			sum += saiki(n, m+i, k+1);
		}
		return sum;
	}
}

int main(){
	int sum = 0;
	int n;
	while(scanf("%d", &n)>0){
		/*
		sum = 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) sum++;
					}
				}
			}
		}
		printf("%d\n", sum);
		*/
		cout << saiki(n, 0, 0) << endl;
	}

	return 0;
}

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

using namespace std;

int main(void)
{
	int n;
	cin >> n;

	int count = 0;
	vector<int> result;
	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(a+b+c+d == n)
							count++;

		result.push_back(count);
		count = 0;
	}

	for(const int& x : result){
		cout << x << endl;
	}


	return 0;
}

C++: #include <cstdio>

#define reep(i,n,m) for(int i=(n);i<(m);i++)
#define rep(i,n) reep(i,0,n)

int main(){
    int n;
    while(scanf("%d",&n)!=EOF){
        int ans=0;
        rep(a,10){
            rep(b,10){
                rep(c,10){
                    rep(d,10){
                        if(a+b+c+d==n)
                            ans++;
                    }
                }
            }
        }

        printf("%d\n",ans);
    }
}

C++: #include <algorithm>
#include <iostream>
#include <cstring>
#include <cstdio>
#define mid (l+r>>1)
#define lc (o<<1)
#define rc (o<<1|1)
using namespace std;
const int maxn = 1000010;

int sumv[maxn*4], ql, qr, v, _sum;
int n;

void insert(int o, int l, int r)
{
    if(ql <= l && r <= qr) {
        sumv[o] = 1<<v;
        return;
    }
    sumv[lc] = sumv[rc] = sumv[o];
    sumv[o] = 0;
    int m = mid;
    if(ql <= m) insert(lc, l, m);
    if(qr >  m) insert(rc, m+1, r);
    sumv[o] = sumv[lc] | sumv[rc];
    printf("%d %d %d\n", l, r, sumv[o]);
}

void query(int o, int l, int r)
{
    if(ql <= l && r <= qr) {
        _sum |= sumv[o];
        return;
    }
    int m = mid;
    if(ql <= m) query(lc, l, m);
    if(qr >  m) query(rc, m+1, r);
}

int gao(int s)
{
    int ans = 0;
    while(s) {
        ans += s&1;
        s >>= 1;
    }
    return ans;
}

int main()
{
    freopen("b.txt", "r", stdin);
    freopen("bout", "w", stdout);
    int m;
    while(scanf("%d%d", &n, &m), n)
    {
        printf("%d %d\n", n, m);
        if(n == 0) break;
        memset(sumv, 0, sizeof sumv);
        char op[3];
        for(int i = 0; i < m; i++)
        {
            scanf("%s", op);
            if(op[0] == 'P') {
                scanf("%d%d%d", &ql, &qr, &v); v--;
                insert(1, 1, n);
                puts("");
            } else {
                scanf("%d%d", &ql, &qr);
                _sum = 0;
                query(1, 1, n);
                printf("__%d\n", gao(_sum));
            }
        }
    }
    return 0;
}
/*
5 10
1 3 4
1 5 4

1 2 12
1 3 12
1 5 12

__1
__2
1 3 12
1 5 12

1 3 76
1 5 76

__3
__2
4 5 204
1 5 204

__4
*/

C++: #include<string>
#include<vector>
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<sstream>
#include<functional>
#include<map>
#include<set>
#include<cmath>

#define REP(i,s,e) for(int i=int(s);i<=int(e);i++)
#define rep(i,n) for(int i=0;i<int(n);i++)

using namespace std;

int main(){

	int n;
	while(true){

	cin >> n;

	if(cin.fail()) break;

	int x=0; int y=0; int s=0;
	REP(i,0,n){
		REP(a,0,9){
		REP(b,0,9){
		if(a+b==i) x++;
		}
		}
		REP(c,0,9){
		REP(d,0,9){
		if(c+d==n-i) y++;
		}
		}

		s+=x*y;
		x=0; y=0;
	}

	cout << s << endl;

	}

	return 0;
}

C++: #include<iostream>

using namespace std;
#define RENT 100000
int main(){
	int n, ans;
	int counter = 0;
	while (cin >> n){
ans=0;
		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<bits/stdc++.h>
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
#define pb push_back
int dy[]={0, 0, 1, -1, 0};
int dx[]={1, -1, 0, 0, 0};
 
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)

int main(){
    int n;
    while(scanf("%d",&n) != EOF){
        int c = 0;
        REP(i,10){
            REP(j,10){
                REP(k,10){
                    REP(l,10){
                        if(i + j + k + l == n)
                            c++;
                    }
                }
            }
        }
        printf("%d\n",c);
    }
}

C++: #include <iostream>

using namespace std;

int main() {
    int n;
    while (cin >> n) {
        int 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;
}

C++: #include <iostream>

using namespace std;

int main() {
	int n, ans = 0;
	while (cin >> n) {
		ans = 0;
		if (cin.eof())
			return 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)
							ans++;
					}
				}
			}
		}
		cout << ans << endl;
	}
	return 0;
}

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

int main(void){
    int n;
    int a,b,c,d;
    int count;
    while(cin>>n){
        count=0;
        for(a=0;a<=9;a++){
            for(b=0;b<=9;b++){
                for(c=0;c<=9;c++){
                    d=n-a-b-c;
                    if(0<=d and d<=9){count++;}
                }
            }
        }
        cout<<count<<endl;
    }
    return 0;
}