Submission #1167461

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167461		Warinchai	Safety (NOI18_safety)	C++20	100 / 100	33 ms	5240 KiB

safety

#include<bits/stdc++.h>
#define int long long
using namespace std;
int ar[200005];
priority_queue<int,vector<int>,greater<int>>pqr;
priority_queue<int>pql;
int lzl=0;
int lzr=0;
int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n,h;cin>>n>>h;
    for(int i=1;i<=n;i++){
        cin>>ar[i];
    }
    int ans=0;
    for(int i=1;i<=n;i++){
        lzl-=h;
        lzr+=h;
        if(i!=1&&ar[i]>pqr.top()+lzr){
            ans+=abs(ar[i]-(pqr.top()+lzr));
            pqr.push(ar[i]-lzr);
            pqr.push(ar[i]-lzr);
            pql.push(pqr.top()+lzr-lzl);
            pqr.pop();
        }else if(i!=1&&ar[i]<pql.top()+lzl){
            ans+=abs(ar[i]-(pql.top()+lzl));
            pql.push(ar[i]-lzl);
            pql.push(ar[i]-lzl);
            pqr.push(pql.top()+lzl-lzr);
            pql.pop();
        }else{
            pql.push(ar[i]-lzl);
            pqr.push(ar[i]-lzr);
        }
    }
    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