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Submission #775953

# Submission time Handle Problem Language Result Execution time Memory
775953 2023-07-07T07:40:27 Z Jomnoi Toy Train (IOI17_train) C++17
16 / 100
 683 ms 1376 KB 
#include <bits/stdc++.h>
#include "train.h"
using namespace std;

const int MAX_N = 5005;
const int MAX_M = 20005;

int N, M;
bool ok;
vector <int> graph[MAX_N], rgraph[MAX_N];
int A[MAX_N], R[MAX_N], good[MAX_N];
bool visited[MAX_N];
bool self[MAX_N], nxt[MAX_N];
vector <int> ans;

bool dfs(int u, int x) {
	visited[u] = true;
	for (auto v : graph[u]) {
		if (v == x) return true;
		if (visited[v] == false and dfs(v, x) == true) return true;
	}
	return false;
}

bool dfs3(int u, int x) {
	visited[u] = true;
	for (auto v : graph[u]) {
		if (v == x) return true;
		if (visited[v] == false and R[v] == 0 and dfs3(v, x) == true) return true;
	}
	return false;
}

bool dfs2(int u) {
	visited[u] = true;
	if (R[u] == 1) return true;
	for (auto v : graph[u]) {
		if (visited[v] == false and dfs2(v) == true) return true;
	}
	return false;
}

void dfs4(int v) {
	visited[v] = true;
	ans[v] = 0;
	for (auto u : rgraph[v]) {
		if (visited[u] == false) dfs4(u);
	}
}

vector <int> who_wins(vector <int> a, vector <int> r, vector <int> u, vector <int> v) {
	N = a.size(), M = u.size();
	bool all_1 = true, sub1 = true;
	for (int i = 0; i < N; i++) {
		A[i] = a[i], R[i] = r[i];

		if (A[i] == 0) all_1 = false;
	}
	for (int i = 0; i < M; i++) {
		if (u[i] != v[i] and u[i] != v[i] - 1) sub1 = false;
		if (u[i] == v[i]) self[u[i]] = true;
		else if (u[i] + 1 == v[i]) nxt[u[i]] = true;

		graph[u[i]].push_back(v[i]);
	}

	ans = vector <int> (N, 0);
	if (sub1 == true) {
		ok = R[N - 1];
		for (int i = N - 1; i >= 0; i--) {
			if (self[i] == true) {
				if (R[i] == 1 and A[i] == 1) ok = true;
				else if (R[i] == 0 and A[i] == 0) ok = false;
			}
			
			ans[i] = ok;

			if (i > 0 and nxt[i - 1] == false) ok = R[i - 1];
		}
	}
	else if (all_1 == true) {
		for (int s = 0; s < N; s++) {
			if (R[s] == 0) continue;
			for (int i = 0; i < N; i++) visited[i] = false;

			if (dfs(s, s) == false) R[s] = 0;
		}
		for (int s = 0; s < N; s++) {
			for (int i = 0; i < N; i++) visited[i] = false;

			ans[s] = dfs2(s);
		}
	}
	else {
		ans = vector <int> (N, 1);
		for (int s = 0; s < N; s++) {
			if (R[s] == 1) continue;
			for (int i = 0; i < N; i++) visited[i] = false;

			if (dfs3(s, s) == false) continue;

			for (int i = 0; i < N; i++) visited[i] = false;
			dfs4(s);
		}
	}
	return ans;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 852 KB Output is correct
2 Correct 3 ms 852 KB Output is correct
3 Correct 3 ms 852 KB Output is correct
4 Correct 3 ms 980 KB Output is correct
5 Correct 3 ms 852 KB Output is correct
6 Correct 3 ms 852 KB Output is correct
7 Correct 3 ms 852 KB Output is correct
8 Correct 3 ms 852 KB Output is correct
9 Correct 3 ms 852 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 2 ms 852 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 468 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
2 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 1376 KB Output is correct
2 Correct 112 ms 1340 KB Output is correct
3 Correct 124 ms 1364 KB Output is correct
4 Correct 88 ms 1252 KB Output is correct
5 Correct 103 ms 1308 KB Output is correct
6 Correct 431 ms 1236 KB Output is correct
7 Correct 137 ms 1212 KB Output is correct
8 Correct 83 ms 1204 KB Output is correct
9 Correct 174 ms 1200 KB Output is correct
10 Correct 69 ms 1172 KB Output is correct
11 Correct 109 ms 1104 KB Output is correct
12 Correct 18 ms 1140 KB Output is correct
13 Correct 351 ms 1340 KB Output is correct
14 Correct 683 ms 1344 KB Output is correct
15 Correct 499 ms 1364 KB Output is correct
16 Correct 18 ms 1236 KB Output is correct
17 Correct 60 ms 1268 KB Output is correct
18 Correct 250 ms 1176 KB Output is correct

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1108 KB 3rd lines differ - on the 696th token, expected: '0', found: '1'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 319 ms 1348 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 852 KB Output is correct
2 Correct 3 ms 852 KB Output is correct
3 Correct 3 ms 852 KB Output is correct
4 Correct 3 ms 980 KB Output is correct
5 Correct 3 ms 852 KB Output is correct
6 Correct 3 ms 852 KB Output is correct
7 Correct 3 ms 852 KB Output is correct
8 Correct 3 ms 852 KB Output is correct
9 Correct 3 ms 852 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 2 ms 852 KB Output is correct
12 Incorrect 1 ms 468 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
13 Halted 0 ms 0 KB -