Submission #203796

#	Time	Username	Problem	Language	Result	Execution time	Memory
203796		dennisstar	Safety (NOI18_safety)	C++17	100 / 100	163 ms	5524 KiB

safety

#include <bits/stdc++.h>
#define em emplace
using namespace std;
typedef long long ll;

priority_queue<ll> L, R;
int N; ll H, S, A;

int main() {
	cin>>N>>H;
	for (int i=1; i<=N; i++) {
		cin>>S;
		if (i==1) { L.em(S), R.em(-S); continue; }
		if (S<L.top()-H*(i-1)) A+=(L.top()-H*(i-1))-S, R.em(-L.top()+2*H*(i-1)), L.em(S+H*(i-1)), L.em(S+H*(i-1)), L.pop();
		else if (S>-R.top()+H*(i-1)) A+=S+R.top()-H*(i-1), L.em(-R.top()+2*H*(i-1)), R.em(-S+H*(i-1)), R.em(-S+H*(i-1)), R.pop();
		else L.em(S+H*(i-1)), R.em(-S+H*(i-1));
	}
	cout<<A<<'\n';
	return 0;
}

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