Submission #158512

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
158512	2019-10-17 13:25:55	gs18103	Safety (NOI18_safety)	C++14	100 / 100	70 ms	7148 KiB

safety

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll s[202020];
priority_queue <ll> L;
priority_queue <ll, vector <ll>, greater <ll> > R;
int main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n; ll h;
  cin >> n >> h;
  for(int i = 1; i <= n; i++) {
    cin >> s[i];
  }
  ll ans = 0;
  L.push(s[1]), R.push(s[1]);
  for(int i = 2; i <= n; i++) {
    ll l = L.top() - h * (i - 1), r = R.top() + h * (i - 1);
    if(s[i] < l) {
      ans += l - s[i];
      L.push(s[i] + h * (i - 1));
      L.push(s[i] + h * (i - 1));
      R.push(l - h * (i - 1));
      L.pop();
    }
    else if(s[i] > r) {
 
 
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