Submission #435438

#	Time	Username	Problem	Language	Result	Execution time	Memory
435438		Maqsut_03	Keys (IOI21_keys)	C++17	20 / 100	112 ms	17184 KiB

keys

#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
using namespace std;
const int N = 2222;

vector<pair<int, int> > g[N];
int n, m;



std::vector<int> find_reachable(std::vector<int> r, std::vector<int> u, std::vector<int> v, std::vector<int> c)
{
	std::vector<int> ans(r.size(), 1);

	n = r.size();
	m = u.size();
	for (int i=0; i<m; i++)
    {
        g[v[i]].push_back({u[i], c[i]});
        g[u[i]].push_back({v[i], c[i]});
    }

	queue<int> s;
	bool used[N], ka[N];
	int q, k[N];

	for  (int i=0; i<n; i++)
    {
        memset(used, 0, sizeof(used));
        memset(ka, 0, sizeof(ka));
        s.push(i);

    while (s.size() > 0)
        {
            int i0 = s.front();
            ka[r[i0]] = 1;
            s.pop();
            for (auto l:g[i0])
            {
                if (ka[l.ss] == 1 && used[l.ff] == 0){
                    s.push(l.ff);
                    used[l.ff] = true;
                }
            }
        }

        q = 0;
        for (int i0=0; i0<n; i0++)
            if (used[i0]) q++;
        k[i] = q;
    }

	int mn = N;
	for (int i=0; i<n; i++) mn = min(k[i], mn);
	for (int i=0; i<n; i++)
        if (k[i] != mn) ans[i] = 0;
	return ans;
}

/**
4 5
0 1 1 2
0 1 0
0 2 0
1 2 1
1 3 0
3 1 2

*/

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 0 / 17
• Subtask 4: 0 / 30
• Subtask 5: 0 / 33