Submission #1099034

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099034		noyancanturk	Safety (NOI18_safety)	C++17	100 / 100	39 ms	7036 KiB

safety

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

#define int int64_t    
#define pb push_back

using pii=pair<int,int>;

const int lim=2e5+100;
const int mod=1e9+7;


signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#ifdef Local  
    freopen(".in","r",stdin);freopen(".out","w",stdout);
#endif
    int n,h;
    cin>>n>>h;
    int a[n];
    for(int i=0;i<n;i++)cin>>a[i];
    priority_queue<int>p1;
    priority_queue<int,vector<int>,greater<int>>p2;
    p1.push(INT_MIN);
    p2.push(INT_MAX);
    int ans=0;
    int shift=0;
    for(int i=0;i<n;i++){
        shift+=h;
        int leftguy=p1.top()-shift;
        int rightguy=p2.top()+shift;
        assert(leftguy<=rightguy);
        if(leftguy<=a[i]&&a[i]<=rightguy){
            p1.push(a[i]+shift);
            p2.push(a[i]-shift);
        }else if(rightguy<a[i]){
            ans+=a[i]-rightguy;
            p1.push(rightguy+shift);
            p2.pop();
            p2.push(a[i]-shift);
            p2.push(a[i]-shift);
        }else{
            ans+=leftguy-a[i];
            p2.push(leftguy-shift);
            p1.pop();
            p1.push(a[i]+shift);
            p1.push(a[i]+shift);
        }
    }
    cout<<ans;
}

• 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