Submission #542637

#	Time	Username	Problem	Language	Result	Execution time	Memory
542637		Zhora_004	Usmjeravanje (COCI22_usmjeravanje)	C++17	0 / 110	1 ms	212 KiB

Main

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <string>
#include <sstream>
#include <iomanip>
#include <map>
#include <unordered_map>
#include <stack>
#include <cstdio>
#include <climits>
#include <tuple>
#include <ctime>
#include <cstring>
#include <numeric>
#include <functional>
#include <chrono>
#include <cassert>
#include <bitset>
//#include <bit>
//#include <ranges>
//#include <numbers>
#define itn int
#define sacnf scanf
#define sz(a) ((int)((a).size()))
// printf("%.10f\n", ans);
using ll = long long;
using namespace std;
const ll mod = 1e9 + 7;
const int N = 1e5 + 5;
int a, b, m;
vector<bool> used;
vector<int> order;
vector<pair<int, int>> edges;
vector<vector<int>> gp, rev_gp, tgp, rev_tgp;

void dfs1(int v) 
{
    used[v] = 1;
    for (auto u : tgp[v]) if (!used[u]) dfs1(u);
    order.push_back(v);
}

void dfs2(int v) 
{
    used[v] = 1;
    for (auto u : rev_tgp[v]) if (!used[u]) dfs2(u);
}

int cnt()
{
    used.assign(a + b, 0);
    for (int i = 0; i < a + b; i++) if (!used[i]) dfs1(i);
    used.assign(a + b, false);
    reverse(order.begin(), order.end());
    int c = 0;
    for (auto v : order)
    {
        if (!used[v]) 
        {
            dfs2(v);
            c++;
        }
    }
    order.clear();
    return c;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> a >> b >> m;
    edges = vector<pair<int, int>>(m);
    gp = rev_gp = vector<vector<int>>(a + b);
    for (int i = 0; i < m; i++) cin >> edges[i].first >> edges[i].second;
    for (int i = 0; i < a - 1; i++) gp[i].push_back(i + 1), rev_gp[i + 1].push_back(i);
    for (int i = 0; i < b - 1; i++) gp[a + i].push_back(a + i + 1), rev_gp[a + i + 1].push_back(a + i);
    int mn = INT_MAX;
    vector<int> ans;
    for (int i = 0; i < (1 << m); i++)
    {
        vector<int> vec;
        for (int j = 0; j < m; j++) vec.push_back((i >> j) & 1);
        reverse(vec.begin(), vec.end());
        tgp = gp;
        rev_tgp = rev_gp;
        for (int j = 0; j < m; j++)
        {
            int u = edges[j].first, v = edges[j].second;
            u--, v--;
            v += a;
            if (vec[j]) swap(u, v);
            tgp[u].push_back(v);
            rev_tgp[v].push_back(u);
        }
        int c = cnt();
        if (c < mn)
        {
            mn = c;
            ans = vec;
        }
    }
    cout << mn << "\n";
    for (int& i : ans) cout << i << " ";

    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60