Submission #1053153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053153		Huseyn123	Keys (IOI21_keys)	C++17	37 / 100	80 ms	19808 KiB

keys

#include <bits/stdc++.h> 
using namespace std; 
const int N=2001;
int a[N],b[N],d[N],cnt[N];
vector<int> R,C;
vector<vector<pair<int,int>>> g(N),e(N);
void dfs(int v){
	d[v]=1;
	if(b[R[v]]==0){
		for(auto x:e[R[v]]){
			if(d[x.first]+d[x.second]==1){
				if(d[x.first]){
					dfs(x.second);
				}
				else{
					dfs(x.first);
				}
			}
		}
	}
	b[R[v]]=1;
	for(auto x:g[v]){
		if(d[x.first] || b[x.second]==0){
			continue;
		}
		dfs(x.first);
	}
}
vector<int> find_reachable(vector<int> r, vector<int> u, vector<int> v, vector<int> c) {
	R=r;
	C=c;
	int n=(int)r.size(); 
	int m=(int)c.size();
	for(int i=0;i<m;i++){
		g[u[i]].push_back({v[i],c[i]}); 
		g[v[i]].push_back({u[i],c[i]});
		e[c[i]].push_back({u[i],v[i]});
	}
	vector<int> ans(r.size(), 1);
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			a[j]=b[j]=d[j]=0;
		}
		dfs(i);
		for(int j=0;j<n;j++){
			cnt[i]+=d[j];
		}
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(cnt[i]>cnt[j]){
				ans[i]=0;
			}
		}
	}
	return ans;
}

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