Submission #494387

#	Time	Username	Problem	Language	Result	Execution time	Memory
494387		Khizri	Keys (IOI21_keys)	C++17	0 / 100	0 ms	332 KiB

keys

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define pb push_back
#define F first
#define S second
const int mxn=2000+5;
int n,m;
vector<pii>vt[mxn];
vector<int> bfs(int u,vector<int> &r){
    vector<int>v1,arr;
    vector<int>color(n+5);
    vector<int>mp(n+5);
    color[u]=1;
    bool q=true;
    v1.pb(u);
    arr.pb(r[u]);
    mp[r[u]]=1;
    while(q){
        q=false;
        for(int x:v1){
            for(pii p:vt[x]){
                int v=p.F,k=p.S;
                if(color[v]) continue;
                if(mp[k]){
                    mp[r[v]]=1;
                    arr.pb(r[v]);
                    v1.pb(v);
                    color[v]=1;
                    goto loop;
                    q=true;
                }
            }
        }
        loop:;
    }
    return v1;
}
vector<int> find_reachable(vector<int> r,vector<int> u,vector<int> v,vector<int> c) {
    n=r.size();
    m=u.size();
	for(int i=0;i<m;i++){
        vt[u[i]].pb({v[i],c[i]});
        vt[v[i]].pb({u[i],c[i]});
	}
	int cnt=1e7;
	vector<int>ans;
    for(int i=0;i<n;i++){
        vector<int>vt=bfs(i,r);
        if(vt.size()<cnt){
            cnt=vt.size();
            ans=vt;
        }
    }
    vector<int>s(n);
    for(int v:ans){
        s[v]=1;
    }
    return s;
}

Compilation message (stderr)

keys.cpp: In function 'std::vector<int> find_reachable(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
keys.cpp:51:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   51 |         if(vt.size()<cnt){
      |            ~~~~~~~~~^~~~

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