Go: package main

import "fmt"

func isOrdered(a []int) bool {
	if len(a) <= 1 {
		return true
	}
	for i := 0; i+1 < len(a); i++ {
		if a[i] > a[i+1] {
			return false
		}
	}
	return true
}

func main() {
	// ボールの数がせいぜい10個しかないので、全てのボールの落とし方を全探索することが可能
	// Bit全探索を行う。右から見てj番目のビットが立っているときには左側の筒、立っていない時は右側の筒にいれる物とする。
	// 全てのボールを落とし終わった後に、それぞれの筒で昇順に並んでいるか調べることにする。
	var t int
	fmt.Scan(&t)
	ans := make([]bool, t)
	for i := 0; i < t; i++ {
		balls := make([]int, 10)
		for i := range balls {
			fmt.Scan(&balls[i])
		}
		ans[i] = false
		for bits := 0; bits < (1 << uint(10)); bits++ {
			pipeB := make([]int, 0)
			pipeC := make([]int, 0)
			for j := 0; j < 10; j++ {
				if (bits & (1 << uint(j))) != 0 {
					pipeB = append(pipeB, balls[j])
				} else {
					pipeC = append(pipeC, balls[j])
				}
			}
			if isOrdered(pipeB) && isOrdered(pipeC) {
				// fmt.Printf("test case %d - OK pattern - pipeB %v, pipec %v\n", i, pipeB, pipeC)
				ans[i] = true
				break
			}
		}
	}
	for i := range ans {
		if ans[i] {
			fmt.Println("YES")
		} else {
			fmt.Println("NO")
		}
	}
}

C++: #include <stdio.h>

int main(void)
{
	int i, j;
	int ball[10];
	int a, b;
	int n;
	
	scanf("%d", &n);
	
	for (i = 0; i < n; i++){
		for (j = 0; j < 10; j++){
			scanf("%d", &ball[i]);
		}
		
		for (j = 0; j < 10; j++){
			if (ball[i] < a && ball [i] < b){
				printf("NO\n");
				break;
			}
			if (a > b && a < ball[i]){
				a = ball[i];
			}
			else if (a < b && b < ball[i]){
				b = ball[i];
			}
			else if (a < ball[i]){
				a = ball[i];
			}
			else if (b < ball[i]){
				b = ball[i];
			}
		}
		if (j == 10){
			printf("YES\n");
		}
	}
	return (0);
}

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

std::string answer;
std::vector<int> input, left, right;

void dfs(int i, std::vector<int> L, std::vector<int> R){
	int temp, L_flag, R_flag;
	std::vector<int> Add_L, Add_R;

	if(answer.compare("YES")==0 || i>9) return;

	L_flag = R_flag = 0;
	if(L.size()>0){
		temp = L[0];
		for(unsigned int j=1; j<L.size(); j++){
			if(temp>L[j]){
				L_flag = 1;
				break;
			}
			temp = L[j];
		}
	}
	if(R.size()>0){
		temp = R[0];
		for(unsigned int j=1; j<R.size(); j++){
			if(temp>R[j]){
				R_flag = 1;
				break;
			}
			temp = R[j];
		}
	}

	if(L_flag>0 || R_flag>0) { return; }
	else if(L_flag==0 && R_flag==0 && i==9) { answer = "YES"; }
	
	Add_L = L;
	Add_L.insert(Add_L.end(), input[i]);
	Add_R = R;
	Add_R.insert(Add_R.end(), input[i]);

	dfs(i+1, Add_L, R);
	dfs(i+1, L, Add_R);
}

int main(void){
	int n, number;
	std::cin >> n;

	for(int i=0;i<n;i++){
		input.clear();
		left.clear();
		right.clear();
		
		for(int j=0;j<10;j++){
			std::cin >> number;
			input.insert(input.end(), number);
		}
		answer = "CHECK";
		dfs(0, left, right);
		if(answer.compare("CHECK")==0) answer="NO";
		std::cout << answer << std::endl;
	}
	return 0;
}

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

using namespace std;

int main()
{
        int set_number, L, R, flag = 0;
        cin >> set_number;
        array< int, 10 > ar;

        for ( int i = 0 ; i < set_number ; i++ )
        {
                for ( int j = 0 ; j < 10 ; j++ )
                {
                        cin >> ar[j];
                }

                L = ar[0];
                R = 0;
                for ( int j = 1 ; j < 10 ; j++ )
                {
                        if ( L < ar[j] )
                        {
                                L = ar[j];
                        }
                        else if ( L > ar[j] )
                        {
                                if ( R < ar[j] )
                                {
                                        R = ar[j];
                                }
                                else
                                {
                                        cout << "No" << endl;
                                        flag = 1;
                                        break;
                                }
                        }
                }

                if ( flag == 0 )
                {
                        cout << "Yes" << endl;
                }
                flag = 0;
        }

        return 0;
}

C++: #include <iostream>
using namespace std;
int main( void )
{
	int N; // f[^ZbgÌÂ
	cin >> N;

	for ( int lpc = 0; lpc < N; lpc++ )
	{
		int a = 0;
		int b = 0;
		int cnt = 0;
		for ( int i = 0; i < 10; i++ )
		{
			int c;
			cin >> c;

			bool ok = false;
			if ( a < c )
			{
				if ( b < c && b > a )
					b = c;
				else
					a = c;
				ok = true;
			}
			else if ( b < c )
			{
				if ( a < c && a > b )
					a = c;
				else
					b = c;
				ok = true;
			}

			if ( ok == false )
			{
				while ( i+1 < 10 )
				{
					cin >> c;
					i++;
				}
				break;
			}

			cnt++;

		}

		if ( cnt == 10 )
		{
			cout << "YES" << endl;
		}
		else
		{
			cout << "NO" << endl;
		}

	}

	return 0;
}

C++: #include<cstdio>
using namespace std;
int a[11],b,c,f;
void dfs(int n){
	int d;
	if(f)
		return;
	if(n==11){
		f=1;
		return;
	}
	if(a[n]>b){
		d=b;
		b=a[n];
		dfs(n+1);
		b=d;
	}
	if(a[n]>c){
		d=c;
		c=a[n];
		dfs(n+1);
		c=d;
	}
}
int main(){
	int t,i;
	scanf("%d",&t);
	while(t--){
		f=0;
		for(i=1;i<=10;i++)
			scanf("%d",&a[i]);
		b=0;
		c=0;
		dfs(1);
		if(f)
			printf("YES\n");
		else
			printf("NO\n");
	}
	return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<cstring>
#include<cmath>
#include<queue>
using namespace std;
int a,b,temp,n;
int main()
{
    int n;
    cin>>n;
    while(n--){
        int flag=1;
        queue<int>que;
        for(int i=0;i<10;i++){
            cin>>temp;
            que.push(temp);
        }
        while(que.size()){
            temp=que.front();
            que.pop();
            if(temp<=a&&temp<=b){
                cout<<"NO\n";
                flag=0;
                break;
            }
            else if(temp<=a&&temp>b)b=temp;
            else if(temp<=b&&temp>a)a=temp;
            else {
                if(a>=b)a=temp;
                else b=temp;
            }
        }
        if(flag)cout<<"YES\n";
    }

    return 0;
}