Submission #1230054

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230054		Gray	The Potion of Great Power (CEOI20_potion)	C++20	38 / 100	783 ms	327680 KiB

potion

#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second

vector<int> h;
int n, mxd, d;
vector<vector<set<int>>> A;
vector<vector<ll>> tA;

void init(int N, int D, int H[]) {
    n=N; mxd=D; h.resize(n);
    for (int i=0; i<n; i++) h[i]=H[i];
}

void curseChanges(int U, int u[], int v[]) {
    A.resize(n); tA.resize(n); d=U;
    for (int i=0; i<n; i++) {
        A[i].push_back(set<int>()); tA[i].push_back(0);
    }

    for (int i=0; i<U; i++){
        A[u[i]].push_back(A[u[i]].back());
        A[v[i]].push_back(A[v[i]].back());
        tA[u[i]].push_back(i+1); tA[v[i]].push_back(i+1);
        if (A[u[i]].back().count(v[i])){
            A[u[i]].back().erase(v[i]);
            A[v[i]].back().erase(u[i]);
        }else{
            A[u[i]].back().insert(v[i]);
            A[v[i]].back().insert(u[i]);
        }
    }
}

int question(int x, int y, int v) {
    ll indx = upper_bound(tA[x].begin(), tA[x].end(), v)-tA[x].begin()-1;
    vector<int> hs;
    for (auto u:A[x][indx]){
        hs.push_back(h[u]);
    }
    if (hs.empty()) return 1e9;
    sort(hs.begin(), hs.end());
    hs.erase(unique(hs.begin(), hs.end()), hs.end());

    int mn=1e9;
    int indy = upper_bound(tA[y].begin(), tA[y].end(), v)-tA[y].begin()-1;

    for (auto u:A[y][indy]){
        ll ind = lower_bound(hs.begin(), hs.end(), h[u])-hs.begin();
        if (ind<(ll)hs.size()){
            mn=min(mn, hs[ind]-h[u]);
        }
        if (ind){
            mn=min(mn, h[u]-hs[ind-1]);
        }
    }

    return mn;
}

• Subtask 1: 0 / 0
• Subtask 2: 17 / 17
• Subtask 3: 0 / 14
• Subtask 4: 0 / 18
• Subtask 5: 21 / 21
• Subtask 6: 0 / 30