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 <iomanip>
#include <string>
#include <cstdlib>
#include <math.h>
#include <algorithm>
using namespace std;

int main()
{
int n;
int count;

 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++;
 } 

    cout<<count<<endl;
return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	for(int x;cin>>x;)
	{
		if(x<0 || x >36) break;
		if(x>18)
			x=36-x;
		int sum=1;
		for(int i=1;i<=x;i++)
		{
			int a=(1+i+1)*(i+1)/2;
			sum +=a;
		}
		cout<<sum<<endl;
	}
	return 0;
}

C++: #include <algorithm>
#include <cmath>
#include <climits>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <cassert>
#include <functional>

using namespace std;

#define LOG(...) printf(__VA_ARGS__)
//#define LOG(...)
#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define REP(i,n) for(int i=0;i<(int)(n);++i)
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define RSORT(c) sort((c).rbegin(),(c).rend())
#define CLR(a) memset((a), 0 ,sizeof(a))

typedef long long ll;
typedef unsigned long long ull;
typedef vector<bool> vb;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vb> vvb;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int dx[] = { -1, 0, 1, 0 }; const int dy[] = { 0, 1, 0, -1 };

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

C++: #include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include <functional>
#include <iomanip>
using namespace std;

#define ll long long int

#define rep(p,q) for(int i = p; i < q;i++)


//8
int main(void) {
	int n;
	while (cin >> n) {
		if (n > 36) cout << 0 << endl;
		else {
			int ans = 0;
			for (int i = 0; i < 10; i++) {
				int sum = i;
				for (int j = 0; j < 10; j++) {
					sum = i;
					sum += j;
					if (sum > n)continue;
					for (int k = 0; k < 10; k++) {
						sum = i + j;
						sum += k;
						if (sum > n)continue;
						for (int l = 0; l < 10; l++) {
							sum = i + j + k;
							sum += l;
							if (sum == n) ans++;
						}
					}
				}
			}
			cout << ans << endl;
		}
	}
}

C++: #include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#include <stack>
#include <map>
#include <cmath>

using namespace std;

const int N = 1e6 + 10; 
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;

struct node {
    int x, y;
    bool operator < (const node &a) const {
        if (x != a.x) return x < a.x;
        else return y < a.y; 
    }
};

node s[N], t[N];


int c[111];
bool cmp1(const node &a, const node &b) {
    if (a.x != b.x) return a.x > b.x;
    else return a.y > b.y;
}

int main() {
    int n, m;
    while (scanf("%d%d", &n, &m) != EOF) {
        int ma = 0;
        for (int i = 1; i <= n; ++i) scanf("%d%d", &s[i].x, &s[i].y), ma = max(ma, s[i].y);
        for (int i = 1; i <= m; ++i) scanf("%d%d", &t[i].x, &t[i].y);
        sort(s + 1, s + n + 1, cmp1);
        sort(t + 1, t + m + 1, cmp1);
        int num = 0;long long ans = 0;
        memset(c, 0, sizeof(c));
        int id = 1;
        for (int i = 1; i <= m; ++i) {
            while (id <= n && s[id].x >= t[i].x) {
                ++c[s[id].y];
                ++id;
            }
            for (int j = t[i].y; j <= ma; ++j) {
                if (c[j] != 0) {
                    --c[j];
                    ++num;
                    ans += t[i].x * 500 + t[i].y * 2;
                    break;
                }
            }
        }
        printf("%d %I64d\n", num, ans);
    }
    return 0;
}

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

int main(void) {
  int in;
  int table[51];

  memset(table, 0, sizeof(table));
  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++) {
          table[a + b + c + d]++;
        }
      }
    }
  }
  while(cin) {
    cin >> in;
    cout << table[in] << endl;
  }
  return 0;
}

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

int main (void){
	int n;
	while(~scanf("%d",&n)){
		int a,b,c,d,res=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++)
						res += (a+b+c+d == n);
		std::cout << res << std::endl;
	}

	return 0;
}

C++: #include<iostream>
using namespace std;
int main()
{
int n,S;
int a[4];
S=0;
while(cin>>n)
{
a[0]=0;
a[1]=0;
a[2]=0;
a[3]=0;
for(int i=0;i<10;i++)
{
	a[0]=i;
	if(a[0]+a[1]+a[2]+a[3]==n)
	{
		S++;
	}
	for(int j=0;j<10;j++)
{
	a[1]=j;
	if(a[0]+a[1]+a[2]+a[3]==n)
	{
		S++;
	}
for(int k=0;k<10;k++)
{
	a[2]=k;
	if(a[0]+a[1]+a[2]+a[3]==n)
	{
		S++;
	}
	for(int l=0;l<10;l++)
{
	a[3]=l;
	if(a[0]+a[1]+a[2]+a[3]==n)
	{
		S++;
	}
	
}
}	
}
}	
}
cout<<S<<endl;
return 0;
}

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

using namespace std;
#define loop(i,a,b) for(int i=(a); i<int(b); i++)
#define rep(i,b) loop(i,0,b)

int main(){
  int n;
  while(cin >> n){
    int ans=0;
    rep(i,10)rep(j,10)rep(k,10)rep(l,10){
      ans+=i+j+k+l==n;
    }
    cout << ans << endl;
  }
}

C++: #include <iostream>

using namespace std;

int main() {
  int n;
  while (cin >> n) {
    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 (i + j + k + l == n) {
              ans++;
            }
          }
        }
      }
    }
    cout << ans << endl;
  }
  return 0;
}

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

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

C++: #include<cstdio>

using namespace std;

signed main(){
    int ret = 0;
    int n; scanf("%d", &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 ) ret++;
            }
        }
    }    
    printf( "%d\n", ret );
    return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
int n;
int num=0;
while(cin>>n){
for(int h=0;h<=9;h++){
for(int i=0;i<=9;i++){
for(int j=0;j<=9;j++){
for(int k=0;k<=9;k++){
if(h+i+j+k==n){num++;}
}
}
}
}
cout<<num<<endl;
num=0;
}
}