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 <iostream>
#include <vector>  

using namespace std;

int main() {
	vector<int> left;
	vector<int> right;
	vector<int> all;

	bool flag = true;

	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 10; j++) {
			int temp;
			cin >> temp;
			all.push_back(temp);
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 10; j++) {
			if (left.size() > 0) {
				if (all[10 * i + j] > left[left.size() - 1]) {
					left.push_back(all[10 * i + j]);
				}
				else {
					if (right.size() > 0) {
						if (all[10 * i + j] > right[right.size() - 1])
							right.push_back(all[10 * i + j]);
						else
							flag = false;
					}
					else {
						right.push_back(all[10 * i + j]);
					}
				}
			}
			else {
				left.push_back(all[10 * i + j]);
			}
		}

		if (flag)
			cout << "YES" << endl;
		else
			cout << "NO"<<endl;
		flag = true;
	}

	return 0;
}

C++: //C++14 (Clang 3.8.0)

#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <string>
#define rp(i,a,b) for(int (i)=(int)(a);i<(int)(b);++i)

typedef long long ll;


using namespace std;
int main(){
    int N;
    cin>>N;
    
    for(int i=0;i<N;i++){
        stack<int> a,b;
        a.push(0);
        b.push(0);
        bool flag=true;
        for(int j=0;j<10;j++){
            int tm;
            cin>>tm;
            if(tm>a.top()) a.push(tm);
            else if(tm>b.top()) b.push(tm);
            else {flag=false;}
        }
        if(flag)cout<<"Yes"<<endl;
        else cout<<"No"<<endl;
    }

    return 0;
};

C++: #include<iostream>
using namespace std;
int r[11],l[11],t[11];
int kyes;

void dfs(int i,int j,int k)//j->left,k->right
{
    if(i>10)
    {
        kyes=1;
    }
    if(kyes)
    return;
    if(t[i]>l[j-1])
    {
        l[j]=t[i];
        dfs(i+1,j+1,k);
    }
    if(t[i]>r[k-1])
    {
        r[k]=t[i];
        dfs(i+1,j,k+1);
    }
}
int main()
{
    int i;
    int n;
    cin>>n;
    while(n--)
    {
        for(i=1; i<=10; i++)
            cin>>t[i];
        kyes=0;
        dfs(1,1,1);
        if(kyes)
        cout<<"YES"<<endl;
        else
        cout<<"NO"<<endl;
    }
    return 0;
}

C++: #include <vector>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>
#include <algorithm>
#include <utility>
#include <functional>
#include <sstream>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>

using namespace std;

inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v;}
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str();}

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

#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EACH(t,i,c) for(t::iretator i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define REP(i,n) FOR(i,0,n-1)

const double EPS = 1e-10;

bool ok(vi a) {
	FOR(i, 1, a.size()-1) {
		if(a[i-1] > a[i]) {
			return false;
		}
	}
	return true;
}

int main() {
	int N;
	cin >> N;

	REP(sgz, N) {
		vi a, b;

		int x;
		cin >> x;
		a.push_back(x);
		REP(i, 9) {
			cin >> x;
			if(x > a[a.size()-1]) {
				a.push_back(x);
			} else {
				b.push_back(x);
			}
		}

		if(ok(a) && ok(b)) {
			cout << "YES" << endl;
		} else {
			cout << "NO" << endl;
		}
	}

	return 0;
}

C++: #include <stdio.h>

int main(){
int n,i,j;
int a,b,c;

scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%d",&a);
b=0;
f=0;
for(j=1;j<10;j++){
scanf("%d",&c);
if(a>c&&b>c)f=1;
else if(a<c&&b<c){
if(a>b)a=c;
else b=c;
}
else{
if(a>b)b=c;
else a=c;
}
}
if(f==0){
printf("YES\n");
}
else if(f==1){
printf("NO\n");
}
}
return 0;
}

C++: #include <stdio.h>

int main(void)
{
	int tubeM[10];
	int tube1[10], tube2[10];
	int i, j, k;
	int n;
	int ans;
	
	for (i = 0; i < 10; i++){
		tube2[i] = 0;
	}
	
	scanf("%d", &n);
	
	while(n){
		for (i = 0; i < 10; i++){
			scanf("%d", &tubeM[i]);
		}
		
		tube1[0] = tubeM[0];
		for (i = 1, j = 0, k = 0; i < 10; i++){
			if (tubeM[i] > tube1[j]){
				tube1[j + 1] = tubeM[i];
				j++;
			}
			else {
				tube2[k] = tubeM[i];
				k++;
			}
		}
		
		ans = 0;
		for (i = 1; tube2[i] != 0; i++){
			if (tube2[i - 1] > tube2[i]){
				ans = 1;
				break;
			}
		}
		
		if (ans == 0){
			printf("OK\n");
		}
		else {
			printf("NO\n");
		}
		
		n--;
	}
	
	return (0);
}

C++: #include<iostream>

using namespace std;

int main(void){
	int a[11],fir,n;
	int i;
	cin>>n;
	while(c--){
		int sec = 0;
		for(i=0;i<10;i++){
			cin>>a[i];
		}
		fir=a[0];
		for(i=1;i<10;i++){
			if(fire<a[i])fir=a[i];
			else if(sec<a[i])sec=a[i];
			else break;
		}
		if(i==10)cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
	return 0;

}

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

int main() {
	int n, a;
	vector<int> A;
	vector<vector<int>> AA;
	cin >> n;
	bool check[100] = { 1 };
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 10; j++) {
			cin >> a;
			A.push_back(a);
		}
		AA.push_back(A); A.clear();
	}
	for (int i = 0; i < AA.size(); i++) {
		int b = 0, c = 0; check[i] = 1;
		for (int j = 0; j < AA[i].size(); j++) {
			if (b >= c) {
				if (AA[i][j] > b)b = AA[i][j];
				else {
					if (AA[i][j] > c)c = AA[i][j];
					else {
						check[i] = 0; break;
					}
				}
			}
			else {
				if (AA[i][j] > c)c = AA[i][j];
				else {
					if (AA[i][j] > b)b = AA[i][j];
					else {
						check[i] = 0; break;
					}
				}
			}
		}
	}
	for (int i = 0; i < AA.size(); i++) {
		if (check[i])cout << "YES" << endl;
		else cout << "NO" << endl;
	}
	return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
int loop,ball,hidari,migi;
int main(){
  cin>>loop;
  for(int i=0;i<loop;i++){
    hidari=migi=0;
    for(int j=0;j<10;j++){
      cin>>ball;
      if(ball<=migi&&ball<=hidari){cout<<"NO"<<endl;j=10;}
      if(hidari>migi){
	if(ball>hidari)hidari=ball;
	else migi=ball;
      }
      else{
	if(ball>migi)migi=ball;
	else hidari=ball;
	}
      if(j==9){
	cout<<"YES"<<endl;
      }
    }
  }
}