Submission #568481

#	Time	Username	Problem	Language	Result	Execution time	Memory
568481		losmi247	Building 4 (JOI20_building4)	C++14	0 / 100	1 ms	340 KiB

building4

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6+56;

int n,a[N],b[N],c[N];

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    for(int i = 1; i <= 2*n; i++){
        cin >> a[i];
    }
    for(int i = 1; i <= 2*n; i++){
        cin >> b[i];
    }

    string s = "";
    for(int i = 1; i <= 2*n; i++){
        if(a[i] < b[i]){
            if(a[i] >= c[i-1]){
                s += "A";
                c[i] = a[i];
            }
            else{
                if(b[i] < c[i-1]){
                    cout << -1 << endl;
                    return 0;
                }
                s += "B";
                c[i] = b[i];
            }
        }
        else{
            if(b[i] >= c[i-1]){
                s += "B";
                c[i] = b[i];
            }
            else{
                if(a[i] < c[i-1]){
                    cout << -1 << endl;
                    return 0;
                }
                s += "A";
                c[i] = a[i];
            }
        }
    }

    cout << s << endl;
}

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