Submission #1000948

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000948		vjudge1	Safety (NOI18_safety)	C++17	100 / 100	42 ms	6016 KiB

safety

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define ent "\n"

const int maxn = 2e6 + 100;
const ll INF = (ll)1e18 + 100;
const int inf = 1e9 + 100;
const int MOD = 1e9 + 7;
const int maxl = 14;

int n, h;
int a[maxn];
ll sl, sr;
priority_queue<ll> l;
priority_queue<ll, vector<ll>, greater<ll>> r;

void addl(ll x){l.push(x + sl);}
ll topl(){return l.top() - sl;}
void shiftl(ll x){sl += x;}

void addr(ll x){r.push(x - sr);}
ll topr(){return r.top() + sr;}
void shiftr(ll x){sr += x;}

void test(){
    cin >> n >> h;
    for(int i = 1; i <= n ;i++){
        cin >> a[i];
    }
    addl(a[1]);
    addr(a[1]);
    shiftl(h);
    shiftr(h);
    // out();
    ll sum = 0;
    for(int i = 2; i <= n; i++){
    	if(a[i] < topl()){
    		sum += topl() - a[i];
    		addr(topl());
    		l.pop();
    		addl(a[i]);
    		addl(a[i]);
    	} else if(a[i] > topr()){
    		sum += a[i] - topr();
    		addl(topr());
    		r.pop();
    		addr(a[i]);
    		addr(a[i]);
    	} else{
    		addl(a[i]);
    		addr(a[i]);
    	}
    	shiftl(h);
    	shiftr(h);
    	// out();
    }
    cout << sum;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int t; t = 1;
    while(t--) test();
    cout << ent;
}

• 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