Submission #705056

#	Time	Username	Problem	Language	Result	Execution time	Memory
705056		Nursik	Izlet (COI19_izlet)	C++14	0 / 100	153 ms	10576 KiB

izlet

#include <iostream>
#include <fstream>
#include <iomanip>
#include <vector>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cassert>
#include <ctime>
#include <algorithm>
#include <sstream>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <cstdlib>
#include <cstdio>
#include <iterator>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <bitset>
#include <cstdint>
#include <cassert>
#include <functional>
#include <complex>
#include <random>

using namespace std;
 
#define ll long long
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ld long double
 
const ll maxn = 1e3 + 10, maxm = 20 + 1;
const ll mod = 1e9 + 7, cmod = 998244353, inf = 1e9, blcok = 400, p2 = 31;
const ld eps = 1e-9;

int s, n, a[maxn][maxn], p[maxn], sz[maxn], color[maxn];
vector<int> comps[maxn];
int get(int v){
    if (v == p[v])
        return v;
    return p[v] = get(p[v]);
}
void unite(int a, int b){
    a = get(a), b = get(b);
    if (a == b)
        return;
    if (sz[a] > sz[b])
        swap(a, b);
    p[a] = b;
    sz[b] += sz[a];
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0); 
    cin >> s;
    cin >> n;
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= n; ++j){
            cin >> a[i][j];
        }
    }
    for (int i = 1; i <= n; ++i){
        p[i] = i, sz[i] = 1;
    }
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= n; ++j){
            if (a[i][j] == 1){
                unite(i, j);
            }
        }
    }
    int root = get(1);
    for (int i = 1; i <= n; ++i){
        if (get(i) == root){
            color[i] = 1;
        }
        else{
            color[i] = 2;
        }
        comps[get(i)].pb(i);
        cout << color[i] << " ";
    }
    cout << '\n';
    vector<pair<int, int>> ans;
    for (int i = 1; i <= n; ++i){
        int sz = (int)comps[i].size() - 1;
        for (int j = 0; j < sz; ++j){
            ans.pb(mp(comps[i][j], comps[i][j + 1]));
        }
        if ((int)comps[i].size() > 0 && i != root){
            ans.pb(mp(comps[i][0], root));
        }
    }
    for (auto it : ans){
        cout << it.f << " " << it.s << '\n';
    }
}
/*
*/

• Subtask 1: 0 / 18
• Subtask 2: 0 / 25
• Subtask 3: 0 / 57