Submission #969302

#	Time	Username	Problem	Language	Result	Execution time	Memory
969302		mariaclara	Toy Train (IOI17_train)	C++17	0 / 100	268 ms	1560 KiB

train

#include "train.h"
#include<bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef pair<ll,ll> pii;
const int INF = 1e9+10;
const ll LINF = 1e18+10;
#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define mk make_pair
#define pb push_back
#define f first 
#define s second
 
int t;
bool vis[5005], inv[5005];
vector<int> edges[5005];
 
bool dfs(int x, int raiz) {
	if(inv[x]) return 0;
	vis[x] = 1;
 
	for(auto viz : edges[x]) {
		if(viz == raiz) return 1;
		if(vis[viz]) continue;
		if(dfs(viz,raiz)) return 1;
	}
 
	return 0;
}
 
vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
	int n = sz(a), m = sz(u);
	vector<int> res(n);
 
	for(int i = 0; i < m; i++) edges[v[i]].pb(u[i]);
 
	queue<int> fila;
	
	for(int i = 0; i < n; i++)
		if(r[i]) inv[i] = 1;
 
	for(int i = 0; i < n; i++) {
		if(!r[i]) {
			memset(vis, 0, sizeof(vis));
			if(dfs(i,i)) fila.push(i);
		}
	}
 
	while(!fila.empty()) {
		int x = fila.front();
		fila.pop();
 
		if(res[x]) continue;
		res[x] = 1;
 
		for(auto viz : edges[x])
			fila.push(viz);
	}
	
	return res;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51