Submission #1228129

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228129		jfioashfn333	Cyberland (APIO23_cyberland)	C++20	44 / 100	27 ms	9796 KiB

cyberland

#include "cyberland.h"
#include <vector>
#include <set>
#include <utility>
#include <limits>
#define pb push_back
#define eb emplace_back
#define pii std::pair<int64_t, int64_t>

const int64_t INF = 1e18;
bool u[100005];
std::vector<pii> g[100005];
int t;

void f(int x) {
    u[x] = 1;
    if (x == t) return;
    for (auto p : g[x]) {
        if (!u[p.first]) f(p.first);
    }
}

double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> a) {
    t = H;
    for (int i = 0; i < N; i++) g[i].clear(), u[i] = 0;

    for (int i = 0; i < M; i++) {
        g[x[i]].eb(y[i], c[i]);
        g[y[i]].eb(x[i], c[i]);
    }

    a[0] = 0;
    f(0);

    std::set<pii> q;
    std::vector<int64_t> d(N, INF);
    d[0] = 0;
    q.insert({0, 0});

    for (int i = 1; i < N; i++) {
        if (a[i] == 0 && u[i]) {
            d[i] = 0;
            q.insert({0, i});
        }
    }

    while (!q.empty()) {
        int x = q.begin()->second;
        q.erase(q.begin());
        for (auto p : g[x]) {
            int y = p.first;
            int64_t w = p.second;
            if (d[y] > d[x] + w) {
                q.erase({d[y], y});
                d[y] = d[x] + w;
                q.insert({d[y], y});
            }
        }
    }

    if (d[H] == INF) return -1;
    return d[H];
}

• Subtask 1: 0 / 5
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 16 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3