제출 #155975

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
155975		Minnakhmetov	OBELISK (NOI14_obelisk)	C++14	18 / 25	940 ms	262144 KiB

obelisk

#include <bits/stdc++.h>
   
#define ll long long
#define all(aaa) aaa.begin(), aaa.end()
 
using namespace std;
 
struct E {
    int to, w;
};
 
const int K = 505, H = 105, N = K * H, 
        C = 805, Z = 402, INF = 1e9, M = C * C * 3;
vector<pair<int, int>> holes[K];
vector<E> g[M], g2[N];
int d[M], s[K], d2[N];

int getId(int x, int y, int z) {
    return x * C * 3 + y * 3 + z;
}

void addEdge(int a, int b, int c) {
    g[a].push_back({b, c});
    g[b].push_back({a, c});
}
 
signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int m, k, sx, sy, ex, ey;
    cin >> k >> m >> sx >> sy >> ex >> ey;

    for (int x = 0; x < C; x++) {
        for (int y = 0; y < C; y++) {
            if (m == 1) {
                addEdge(getId(x, y, 0), getId(x, y, 1), 0);
                addEdge(getId(x, y, 1), getId(x, y, 2), 0);
            }
            if (x + 1 < C) {
                addEdge(getId(x, y, 0), getId(x + 1, y, 1), 1);
                addEdge(getId(x, y, 2), getId(x + 1, y, 2), 1);
            }
            if (y + 1 < C) {
                addEdge(getId(x, y, 0), getId(x, y + 1, 2), 1);
                addEdge(getId(x, y, 1), getId(x, y + 1, 1), 1);
            }
            if (x + m < C) {
                addEdge(getId(x, y, 1), getId(x + m, y, 0), 1);
            }
            if (y + m < C) {
                addEdge(getId(x, y, 2), getId(x, y + m, 0), 1);
            }
        }
    }


    fill(d, d + M, -1);
    int start = getId(Z, Z, 0);
    d[start] = 0;
    deque<int> q;
    q.push_back(start);

    while (!q.empty()) {
        int node = q.front();
        q.pop_front();

        for (E e : g[node]) {
            if (d[e.to] == -1) {
                d[e.to] = d[node] + e.w;
                if (e.w)
                    q.push_back(e.to);
                else
                    q.push_front(e.to);
            }
        }
    }
    // cout << d[getId(Z + 1, Z + 1, 0)];
    // return 0;


    holes[k].push_back({sx, sy});
    holes[0].push_back({ex, ey});

    for (int i = k - 1; i > 0; i--) {
        int h;
        cin >> h;

        while (h--) {
            int x, y;
            cin >> x >> y;
            holes[i].push_back({x, y});
        }
    }


    for (int i = 0; i < k; i++) {
        s[i + 1] = s[i] + holes[i].size();
    }

    for (int i = 1; i <= k; i++) {
        for (int x = 0; x < holes[i].size(); x++) {
            for (int y = 0; y < holes[i - 1].size(); y++) {
                int dist = d[getId(holes[i - 1][y].first - holes[i][x].first + Z,
                                   holes[i - 1][y].second - holes[i][x].second + Z, 
                                   0)];
                // cout << x + s[i] << " " << y + s[i - 1] << "\n";
                g2[x + s[i]].push_back({y + s[i - 1], dist});
            }
        }
    }

    priority_queue<pair<int, int>, 
               vector<pair<int, int>>, 
               greater<pair<int, int>>> pq;
                   
    fill(d2, d2 + N, INF);
    d2[s[k]] = 0;
    pq.push({0, s[k]});
 
    while (!pq.empty()) {
        auto p = pq.top();
        pq.pop();
        if (p.first > d2[p.second])
            continue;
        int node = p.second;
 
        for (E e : g2[node]) {
            if (d2[e.to] > d2[node] + e.w) {
                d2[e.to] = d2[node] + e.w;
                pq.push({d2[e.to], e.to});
            }
        }
    }
 
    cout << d2[0] << "\n";

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

obelisk.cpp: In function 'int main()':
obelisk.cpp:102:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int x = 0; x < holes[i].size(); x++) {
                         ~~^~~~~~~~~~~~~~~~~
obelisk.cpp:103:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int y = 0; y < holes[i - 1].size(); y++) {
                             ~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 6 / 6
• Subtask 4: 0 / 7