Submission #999699

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
999699	2024-06-16 05:25:35	Unforgettablepl	Building 4 (JOI20_building4)	C++17	0 / 100	2 ms	856 KiB

building4

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#include <bits/stdc++.h>
using namespace std;
#define int long long
int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<int> A(2*n+2);
    vector<int> B(2*n+2);
    A[2*n+1]=B[2*n+1]=1e9;
    vector<bool> chosen(2*n+1);
    vector<int> val(2*n+2);val[2*n+1]=1e9;
    for(int i=1;i<=2*n;i++)cin>>A[i];
    for(int i=1;i<=2*n;i++)cin>>B[i];
    int cntB = 0;
    for(int i=1;i<=2*n;i++){
        if(A[i]<=B[i]){
            if(A[i]>=val[i-1])val[i]=A[i];
            else if(B[i]>=val[i-1]){
                chosen[i]=true;
                val[i]=B[i];
                cntB++;
            } else {
                cout << "-1\n";
                return 0;
            }
 
 
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• Subtask 1: 0 / 11
• Subtask 2: 0 / 89