Submission #760107

#	Time	Username	Problem	Language	Result	Execution time	Memory
760107		Trisanu_Das	Safety (NOI18_safety)	C++17	0 / 100	66 ms	5816 KiB

safety

#include <bits/stdc++.h>
#define int long long
using namespace std;
 
int a[200001];
priority_queue<int> L, R;
 
signed main() {
	int n, h, ans = 0;
	cin >> n >> h;
	for(int i = 0; i < n; i++) cin >> a[i];
	L.push(a[0]); R.push(-a[0]);
	for(int i = 0; i < n; i++){
		int X = L.top() - h * i, Y = -R.top() + h * i;
		if (X > a[i]) {
			ans += X - a[i];
			L.push(a[i] + h * i);
			L.push(a[i] + h * i);
			R.push(-X + h * i);
			L.pop();
		} else if (Y < a[i]) {
			ans += a[i] - Y;
			R.push(-a[i] + h * i);
			R.push(-a[i] + h * i);
			L.push(Y + h * i);
			R.pop();
		} else {
			L.push(a[i] + h * i);
			R.push(-a[i] + h * i);
		}
	}
	cout << ans << '\n';
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 0 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29