Submission #1297320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1297320		Tymond	Safety (NOI18_safety)	C++20	3 / 100	51 ms	7612 KiB

safety

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::high_resolution_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    
    int n;
    ll H;
    cin >> n >> H;

    vll a(n);
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }

    ll add = 0LL;
    multiset<ll> l;
    multiset<ll> r;
    l.insert(a[0]);
    r.insert(a[0]);
    ll mnVal = 0LL;
    for(int i = 1; i < n; i++){
        add = (ll)add + H;
        if(*(--l.end()) - add <= a[i] && a[i] <= *(r.begin()) + add){
            l.insert(a[i] + add);
            r.insert(a[i] - add);
        }else if(*(--l.end()) - add > a[i]){
            l.insert((ll)a[i] + add);
            ll val = *(--l.end()) - add;
            l.erase(--l.end());
            r.insert((ll)val - add);
            mnVal += abs(a[i] - val);
        }else{
            r.insert((ll)a[i] - add);
            ll val = *(r.begin()) + add;
            r.erase(r.begin());
            l.insert((ll)val + add);
            mnVal += abs(a[i] - val);
        }
    }

    // cout << add << '\n';
    // cerr << "L\n";
    // for(auto ele : l){
    //     cout << ele - add << '\n';
    // }
    // cerr << "R\n";
    // for(auto ele : r){
    //     cout << ele + add << '\n';
    // }

    cout << mnVal << '\n';

    return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 0 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29