Submission #1113895

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113895		Dan4Life	Building 4 (JOI20_building4)	C++17	0 / 100	1 ms	2384 KiB

building4

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
#define int long long
const int N = (int)1e6+10;
int n, a[2][N];

int32_t main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n;
	for(int i = 0; i < 2*n; i++) cin >> a[0][i];
	for(int i = 0; i < 2*n; i++) cin >> a[1][i];
	for(int i = 0; i <= n; i++){
		bool ok = 1; int prv = -1;
		for(int j = 0; j < 2*n; j++){
			if(j>=i and j<i+n) continue;
			ok&=a[0][j]>=prv, prv=a[0][j];
		}
		prv=-1;
		for(int j = i; j < i+n; j++) 
			ok&=a[1][j]>=prv, prv=a[1][j];
		if(ok){
			for(int j = 0; j < 2*n; j++)
				cout << "AB"[j>=i and j<i+n];
			cout << "\n";
			return 0;
		}
	}
	cout << -1 << "\n";
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 89