Submission #1279501

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279501		muhammad-ahmad	Airplane (NOI23_airplane)	C++20	22 / 100	56 ms	3536 KiB

Main

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

#define int long long
#define endl '\n'

signed main(){
	int n, m; cin >> n >> m;
	int alt = 0, ans = n - 1;
	int a[n + 1];
	int mx[n + 1];
	for (int i = 1; i <= n; i++){
		cin >> a[i];
	}
	mx[n] = 0;
	for (int i = n - 1; i >= 1; i--){
		mx[i] = max(mx[i + 1], a[i]);
	}
	for (int i = 1; i < n; i++){
		if (mx[i + 1] > alt) alt++;
		if (mx[i + 1] < alt) alt--;
		if (a[i + 1] > alt){
			if (a[i + 1] > alt){
				ans += a[i + 1] - alt;
				alt = a[i + 1];
			}
		}
	}
	
	cout << ans + alt << endl;
}

• Subtask 1: 22 / 22
• Subtask 2: 0 / 10
• Subtask 3: 0 / 31
• Subtask 4: 0 / 37