Submission #1355231

#	Time	Username	Problem	Language	Result	Execution time	Memory
1355231		kasamchi	Voltage 2 (JOI26_voltage)	C++20	22 / 100	10 ms	896 KiB

voltage

#include "voltage.h"
#include <bits/stdc++.h>
using namespace std;

bool solve(int N, int M) {
    queue<int> quu;
    vector<bool> vis(N);
    for (int i = 0; i < N; i++) {
        vector<int> x(N, 1), y(N, 1);
        x[i] = 0;
        if (query(x, y) == 0) {
            quu.push(i), vis[i] = true;
        }
    }

    while (!quu.empty()) {
        int u = quu.front();
        quu.pop();

        cerr << "BFS: " << u << '\n';

        vector<int> cands;
        for (int i = 0; i < N; i++) {
            if (!vis[i]) {
                cands.push_back(i);
            }
        }

        int ll = 0, rr = cands.size() + 1;
        while (ll + 1 < rr) {
            int mm = ll + (rr - ll) / 2;
            vector<int> x(N, 1), y(N, 1);
            for (int i = 0; i < mm; i++) {
                x[cands[i]] = y[cands[i]] = 0;
            }
            for (int i = 0; i < N; i++) {
                if (vis[i]) {
                    x[i] = y[i] = 0;
                }
            }
            x[u] = 1;
            if (query(x, y) == 0) {
                ll = mm;
            } else {
                rr = mm;
            }
        }
        if (rr < cands.size() + 1) {
            int v = cands[rr - 1];
            answer(u, v);
            cerr << "answer(" << u << ',' << v << ")\n";
            quu.push(v), vis[v] = true;
            M--;
        }
    }
    return (M == 0);
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 0 / 27
• Subtask 4: 0 / 18
• Subtask 5: 0 / 17
• Subtask 6: 0 / 16