oj.uz

Submission #406316

# Submission time Handle Problem Language Result Execution time Memory
406316 2021-05-17T11:12:34 Z bipartite_matching Stations (IOI20_stations) C++14
0 / 100
 1214 ms 620 KB 
#include <bits/stdc++.h>

#define forint(i, N) for (int i = 0; i < (N); i++)

using namespace std;

vector<int> value;
vector<bool> visited;

int minval = 0;

void go(vector< vector<int> >& graph, int n, bool odd) {

	visited[n] = true;

	if (odd) {
		for (auto& i : graph[n]) {
			if (!visited[i]) {
				go(graph, i, !odd);
			}
		}
		value[n] = minval;
		minval++;
	}
	else {
		value[n] = minval;
		minval++;
		for (auto& i : graph[n]) {
			if (!visited[i]) {
				go(graph, i, !odd);
			}
		}
	}
	
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector< vector<int> > graph(n);

	visited.clear();
	visited.resize(n);
	fill(visited.begin(), visited.end(), false);

	value.clear();
	value.resize(n);
	fill(value.begin(), value.end(), -1);

	forint(i, n - 1) {
		graph[u[i]].push_back(v[i]);
		graph[v[i]].push_back(u[i]);
	}

	go(graph, 0, true);

	return value;
}

int find_next_station(int s, int t, vector<int> c) {

	if (c.size() == 1) {
		return c[0];
	}
	
	
	if (s < c[0]) {
		if (t < s || t > c[c.size() - 1]) {
			return c[c.size() - 1];
		}
	}
	else {
		if (t > s || t < c[0]) {
			return c[0];
		}
	}

	int left = 0;
	int right = c.size() - 1;

	while (left + 1 < right) {
		if (t == c[left] || t == c[right]) {
			return t;
		}

		int mid = (left + right) / 2;
		if (t <= c[mid]) {
			right = mid;
		}
		else {
			left = mid;
		}

	}
	if (s < c[0]) {
		return c[right];
	}
	return c[left];
	
	
	/*
	if (s < c[0]) {
		if (t < s || t > c[c.size() - 1]) {
			return c[c.size() - 1];
		}
		forint(i, c.size()) {
			if (c[i] >= t) {
				return c[i];
			}
		}
	}
	else {
		if (t > s || t < c[0]) {
			return c[0];
		}
		for (int i = c.size() - 1; i >= 0; i--) {
			if (t >= c[i]) {
				return c[i];
			}
		}
	}
	*/
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 448 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=0, label=1010
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 268 KB Invalid labels (values out of range). scenario=1, k=1000, vertex=0, label=1989
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 610 ms 620 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1214 ms 560 KB Output is correct
2 Incorrect 692 ms 400 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 641 ms 528 KB Wrong query response.
2 Halted 0 ms 0 KB -