Submission #342480

#	Time	Username	Problem	Language	Result	Execution time	Memory
342480		mjhmjh1104	The Potion of Great Power (CEOI20_potion)	C++14	17 / 100	3087 ms	30816 KiB

potion

#include <set>
#include <map>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;

map<pair<int, int>, vector<int>> m;
vector<int> adj[100006];
vector<int> h;

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

void curseChanges(int U, int A[], int B[]) {
    for (int i = 0; i < U; i++) {
        int a = A[i], b = B[i];
        if (a > b) swap(a, b);
        m[{ a, b }].push_back(i + 1);
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    auto it = m.begin();
    while (it != m.end()) {
        sort(it->second.begin(), it->second.end());
        it = next(it);
    }
}

struct cmp {
    bool operator() (const int &a, const int &b) const {
        return h[a] < h[b];
    }
};

int question(int x, int y, int v) {
    set<int, cmp> adjX, adjY;
    for (auto &i: adj[x]) {
        int a = x;
        int b = i;
        if (a > b) swap(a, b);
        auto it = m.find({ a, b });
        if (it == m.end()) continue;
        int la = upper_bound(it->second.begin(), it->second.end(), v) - it->second.begin();
        if (la % 2) adjX.insert(i);
    }
    for (auto &i: adj[y]) {
        int a = y;
        int b = i;
        if (a > b) swap(a, b);
        auto it = m.find({ a, b });
        if (it == m.end()) continue;
        int la = upper_bound(it->second.begin(), it->second.end(), v) - it->second.begin();
        if (la % 2) adjY.insert(i);
    }
    if (adjX.empty() || adjY.empty()) return 1e9;
    auto i = adjX.begin();
    auto j = adjY.begin();
    int res = 1e9;
    while (i != adjX.end() && j != adjY.end()) {
        res = min(res, abs(h[*i] - h[*j]));
        if (h[*i] <= h[*j]) i = next(i);
        else j = next(j);
    }
    return res;
}

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