Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func nextInt() int {
	scanner.Scan()
	i, e := strconv.Atoi(scanner.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func main() {
	scanner.Split(bufio.ScanWords)
	n := nextInt()
	for i := 0; i < n; i++ {
		a := -1
		b := -1
		ans := true
		// それぞれの筒の一番上にあるたまの数字に着目すればよい
		for j := 0; j < 10; j++ {
			x := nextInt()
			if x > a {
				a = x
			} else if x > b {
				b = x
			} else {
				ans = false
			}
		}
		if ans {
			fmt.Println("YES")
		} else {
			fmt.Println("NO")
		}
	}
}

C++: #include <cstdio>

using namespace std;

bool dfs(int a[],int anum,int bpre,int cpre,int p){
	int ret = 0;
	if(p == anum){
		return 1;
	}
	if(bpre == -1 || a[p] > bpre){
		ret += dfs(a,anum,a[p],cpre,p + 1);
	}
	if(cpre == -1 || a[p] > cpre){
		ret += dfs(a,anum,bpre,a[p],p + 1);
	}
	return ret;
}

bool solve(int a[]){
	return dfs(a,10,-1,-1,0);
}

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

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

int l=0, r=0;
bool flag=true;

void solve(int N) {
	int a = 0;
	while (N > 0) {
		for (int i = 0; i < 10; i++) {
			cin >> a;
			if (a > l)
				l = a;
			else if (a > r)
				r = a;
			else 
				flag = false;
		}
		if (flag == true)
			cout << "YES" << endl;
		else
			cout << "NO" << endl;
		flag = true;
		N--;
	}
}
int main() {
	int n = 0;
	cin >> n;
	solve(n);
	return 0;
}

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

int l,r,x,ball[11],le[11],ri[11],ans,n;
int dfs(int i,int l,int r){
    if(i > 9){
        return ans=1;
    }
    if(le[l]<ball[i]){
        le[++l]=ball[i++];
        dfs(i,l,r);
    }
    else if(ri[r]<ball[i]){
        ri[++r]=ball[i++];
         dfs(i,l,r);
    }
    else
        ans=0;
}
void solve(){
    cin>>n;
    while(n--){
        
        for(int j = 0;j < 10;j++)
            cin>>ball[i];
        ans= 0;
        dfs(0,0,0);
        if(ans)
            cout>>"YES">>endl;
        else
            cout>>"NO">>endl;
        
    }
}

C++: #include <iostream>
#include <queue>
using namespace std;
int ball[10];
int dfs(int k,int B,int C)
{
    if(k == 10)
        return 1;
    if(ball[k] > B)
        return dfs(k + 1,ball[k],C);
    if(ball[k] > C)
        return dfs(k + 1,B,ball[k]);
    return 0;
}
int main(void)
{
    int n;
    cin>>n;
    while(n--){
        int i;
        queue<int> left,right;
        for(i = 0;i < 10;i++)
            cin>>ball[i];
        if(dfs(0,0,0))
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }
    return 0;
}

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

int BALLNUM = 10;

	static int data[10];
class balldata
{
private:
	//static std::vector <int> data;
	//int ballnum;
public:
	balldata(int datanum);
	static void enter();
	static void answer();
	static bool check();
	static bool check(int num,int right,int left);
};




int main()
{
	balldata ball(BALLNUM);

int N;
	std::cin >> N;
	for (int i = 0; i < N; i++)
	{
		ball.enter();
		ball.answer();
	}
}


balldata::balldata(int datanum)
{
	//ballnum = datanum;
	//data.resize(datanum);
}



void balldata::enter()
{
	for (int i = 0; i < 10; i++)
	{
		std::cin >> data[i];
	}
	return;
}

bool balldata::check(int num,int right,int left)
{
	//if (num == data.size())return true;
	if (num == 10)return true;
	if (balldata::check(num + 1, right, data[num])&&left<data[num]){ return true; }
	if (balldata::check(num + 1, data[num], left)&&right<data[num]){ return true; }

	return false;
}
bool check()
{
	return balldata::check(0, 0, 0);
}

void balldata::answer()
{ 
	if (balldata::check(0, 0, 0))
	{
		std::cout << "YES" << std::endl;
	}
	else
	{
		std::cout << "NO" << std::endl;
	}
}

C++: // clang-format off
#include <bits/stdc++.h>
#define int long long
#define main signed main()
// #define main int main()
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define prec(n) fixed << setprecision(n)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
using namespace std;
using pii = pair<int, int>;
using vi = vector<int>;
using vd = vector<double>;
using vc = vector<char>;
using vb = vector<bool>;
using vs = vector<string>;
using vpii = vector<pii>;
using vvi = vector<vi>;
using vvb = vector<vb>;
using vvpii = vector<vpii>;
template<typename A> using fn = function<A>;
constexpr int INF = sizeof(int) == sizeof(long long) ? 1000000000000000000LL : 1000000000;
constexpr int MOD = 1000000007;
constexpr double PI = acos(-1);
template<typename A, typename B> bool cmin(A &a, const B &b) { return a > b ? (a = b, true) : false; }
template<typename A, typename B> bool cmax(A &a, const B &b) { return a < b ? (a = b, true) : false; }
constexpr bool odd(const int &n) { return n & 1; }
constexpr bool even(const int &n) { return !odd(n); }
template<typename V> constexpr typename V::value_type sum(const V &v) { return accumulate(all(v), 0); }
void solve();
main { solve(); return 0; }
// clang-format on

void solve() {
	int n;
	cin >> n;
	rep(i, n) {
		stack<int> l, r;
		rep(j, 10) {
			int x;
			cin >> x;
			if (l.size() == 0) {
				l.push(x);
				continue;
			}
			if (r.size() == 0) {
				if (l.top() < x) {
					l.push(x);
					continue;
				}
				r.push(x);
				continue;
			}
			if (l.top() < r.top()) {
				if (r.top() < x) {
					r.push(x);
					continue;
				}
				if (l.top() < x) {
					l.push(x);
					continue;
				}
			}
			if (r.top() < l.top()) {
				if (l.top() < x) {
					l.push(x);
					continue;
				}
				if (r.top() < x) {
					r.push(x);
					continue;
				}
			}
			cout << "NO" << endl;
			goto a;
		}
		cout << "YES" << endl;
a:;
	}
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
	int T;
	cin >> T;
	while(T--){
		int a=0,b=0;
		string ans = "YES";
		for(int i = 0 ; i < 10 ; i++){
			if( a > b ) swap(a,b);
			int x;
			cin >> x;
			if( x < a ){
				ans = "NO";
			}else if( b < x ){
				b = x;
			}else{
				a = x;
			}
		}
		cout << ans << endl;
	}
	
}

C++: #include<stdio.h>
int a[10];
int bstack[10];
int btop;
int cstack[10];
int ctop;
bool dfs(int i)
{
    bool b1=false,b2=false;
    if(i==10)
        return true;
    if(btop==-1 || bstack[btop]<a[i])
    {
        btop++;
        bstack[btop]=a[i];
        i++;
        b1=dfs(i);
        btop--;
    }
    if(ctop==-1 || cstack[ctop]<a[i])
    {
        ctop++;
        cstack[ctop]=a[i];
        i++;
        b2=dfs(i);
        ctop--;
    }
    return b1||b2;
}
int main()
{
    int n;
    scanf("%d",&n);
    while(n--)
    {
        for(int i=0;i<10;i++)
        {
            scanf("%d",&a[i]);
        }
        btop=-1;
        ctop=-1;
        if(dfs(0))
            printf("YES\n");
        else
            printf("NO\n");
    }
}

C++: #include<bits/stdc++.h>
using namespace std;
main(){
  int n,a;
  srand((unsigned)time(NULL));
  cin>>n;
  for(int i=0;i<n;i++){
    for(int j=0;j<10;j++){
      cin>>a;
    }
    if(rand()%2==0){
      cout<<"YES"<<endl;
    }
    else{
      cout<<"NO"<<endl;
    }
  }
}