Submission #406836

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
406836	2021-05-18T05:56:05 Z	8e7	Toy Train (IOI17_train)	C++14	0 / 100	214 ms	2004 KB

train

#include "train.h"

//Challenge: Accepted
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#define ll long long
#define maxn 5005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
vector<int> adj[maxn], rev[maxn], scc[maxn];
bool found[maxn], poss[maxn], tag[maxn]; 
int group[maxn];
int ord[maxn];
int ti = 0;
void dfs(int n) {
	found[n] = 1;
	for (int v:adj[n]) {
		if (!found[v]) {
			dfs(v);
		}
	}

	ord[ti++] = n;
}
vector<int> node;
void dfs2(int n) {
	node.push_back(n);
	found[n] = 1;
	for (int v:rev[n]) {
		if (!found[v]) dfs2(v);
	}
}
bool dfs3(int n) {
	found[n] = 1;
	if (tag[n]) return true;
	bool ret = false;
	for (int v:scc[n]) {
		if (!found[v]) ret |= dfs3(v);
	}
	return ret;
}
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	int n = a.size(), m = u.size();
	for (int i = 0;i < m;i++) {
		adj[u[i]].push_back(v[i]);
		rev[v[i]].push_back(u[i]);
	}
	for (int i = 0;i < n;i++) {
		if (!found[i]) dfs(i);
	}
	for (int i = 0;i < n;i++) found[i] = 0;
	int cnt = 0;
	for (int i = n - 1;i >= 0;i--) {
		if (!found[ord[i]]) {
			node.clear();
			dfs2(ord[i]);
			int ans = 0;
			for (int j:node) ans |= r[j];
			if(node.size() > 1)	tag[cnt] = ans;
			for (int j:node) group[j] = cnt;
			cnt++;
		}
	}	
	for (int i = 0;i < m;i++) {
		scc[group[u[i]]].push_back(group[v[i]]);
	}
	vector<int> ret;
	for (int i = 0;i < n;i++) {
		for (int j = 0;j < n;j++) found[j] = 0;
		bool res = 0;
		for (int j:scc[group[i]]) {
			if (!found[j]) res |= dfs3(j);
		}	
		ret.push_back(res ? 1 : 0);
	}
	return ret;
}

Subtask #1
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	214 ms	1712 KB	3rd lines differ - on the 14th token, expected: '1', found: '0'
2	Halted	0 ms	0 KB	-

Subtask #2
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	588 KB	3rd lines differ - on the 8th token, expected: '0', found: '1'
2	Halted	0 ms	0 KB	-

Subtask #3
0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	101 ms	2004 KB	Output is correct
2	Correct	93 ms	1940 KB	Output is correct
3	Correct	90 ms	1884 KB	Output is correct
4	Correct	115 ms	1740 KB	Output is correct
5	Correct	128 ms	1732 KB	Output is correct
6	Correct	83 ms	1656 KB	Output is correct
7	Correct	14 ms	1668 KB	Output is correct
8	Correct	39 ms	1760 KB	Output is correct
9	Correct	43 ms	1632 KB	Output is correct
10	Correct	42 ms	1604 KB	Output is correct
11	Incorrect	72 ms	1564 KB	3rd lines differ - on the 89th token, expected: '1', found: '0'
12	Halted	0 ms	0 KB	-