Submission #1093232

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093232		SalihSahin	Keys (IOI21_keys)	C++17	37 / 100	66 ms	21844 KiB

keys

#include "keys.h"
//#include <cassert>
//#include <cstdio>
//#include <vector>
#include <bits/stdc++.h>
using namespace std;

const int N = 2e3 + 5;
vector<int> bekle[N], vis(N), col(N);
vector<pair<int, int> > adj[N];

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);
    int n = r.size();
    int m = u.size();

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

    int mn = N;
    for(int i = 0; i < n; i++){
        queue<int> q;
        q.push(i);
        col[r[i]] = 1;
        int calc = 0;

        while(!q.empty()){
            int x = q.front();
            q.pop();

            if(vis[x]) continue;
            vis[x] = 1;
            //cout<<i<<" -> "<<x<<endl;
            calc++;

            for(auto itr: bekle[r[x]]){
                if(!vis[itr]){
                    q.push(itr);
                    col[r[itr]] = 1;
                }
            }
            bekle[r[x]].clear();

            for(auto itr: adj[x]){
                if(vis[itr.first]) continue;
                if(!col[itr.second]){
                    bekle[itr.second].push_back(itr.first);
                }
                else{
                    col[r[itr.first]] = 1;
                    q.push(itr.first);
                }
            }
        }

        for(int j = 0; j < n; j++){
            vis[j] = col[j] = 0;
            bekle[j].clear();
        }
        mn = min(mn, calc);
        ans[i] = calc;
    }
    for(int i = 0; i < n; i++){
        if(ans[i] == mn) ans[i] = 1;
        else ans[i] = 0;
    }
    return ans;
}

/*
int main(){
    int n, m;
    assert(2 == scanf("%d%d", &n, &m));
    std::vector<int> r(n), u(m), v(m), c(m);
    for(int i=0; i<n; i++) {
        assert(1 == scanf("%d", &r[i]));
    }
    for(int i=0; i<m; i++) {
        assert(3 == scanf("%d %d %d", &u[i], &v[i], &c[i]));
    }
    fclose(stdin);

    std::vector<int> ans = find_reachable(r, u, v, c);

    for (int i = 0; i < (int) ans.size(); ++i) {
        if(i) putchar(' ');
        putchar(ans[i]+'0');
    }
    printf("\n");
    return 0;
}
*/

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