oj.uz

Submission #657028

# Submission time Handle Problem Language Result Execution time Memory
657028 2022-11-08T18:54:58 Z 600Mihnea Swapping Cities (APIO20_swap) C++17
0 / 100
 2000 ms 5808 KB 
#include "swap.h"

#include <bits/stdc++.h>

using namespace std;

mt19937 rng(0);

const int INF = (int) 1e9 + 7;
int n;
int m;
vector<int> t;
vector<int> is_line;
vector<bool> is_endpoint;

int root(int a) {
	if (t[a] == a) {
		return t[a];
	} else {
		return t[a] = root(t[a]);
	}
}

void join(int a, int b, int val) {
	int x = a, y = b;
	a = root(a);
	b = root(b);
	if (a == b) {
		is_line[a] = 0;
		return;
	}
	//if (rng() & 1) {
//		swap(a, b);
//	}
	if (is_line[a] && is_line[b] && is_endpoint[x] && is_endpoint[y]) {
		is_line[a] = 1;
		if (root(x) != x) {
			is_endpoint[x] = 0;
		}
		if (root(y) != y) {
			is_endpoint[y] = 0;
		}
	} else {
		is_line[a] = 0;
	}
	t[b] = a;
}

void clr() {
	t.resize(n);
	is_line.resize(n);
	is_endpoint.resize(n);
	for (int i = 0; i < n; i++) {
		t[i] = i;
		is_line[i] = 1;
		is_endpoint[i] = 1;
	}
}

struct Edge {
	int a;
	int b;
	int w;
};

bool operator < (Edge first, Edge second) {
	return first.w < second.w;
}

vector<Edge> edges;

void init(int N, int M, vector<int> U, vector<int> V, vector<int> W) {
	n = N;
	m = M;
	assert((int) U.size() == m);
	assert((int) V.size() == m);
	assert((int) W.size() == m);
	
	edges.clear();
	for (int i = 0; i < m; i++) {
		edges.push_back({U[i], V[i], W[i]});
	}
	sort(edges.begin(), edges.end());
}


int getMinimumFuelCapacity(int x, int y) {
	clr();
	for (auto &edge : edges) {
		int a = edge.a;
		int b = edge.b;
		int w = edge.w;
		join(a, b, w);
		//cout << a << " " << b << " | " << w << " and I care about " << x << " " << y << "\n";
		if (root(x) == root(y) && !is_line[root(x)]) {
			return w; 
		}
	}
	return -1;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 36 ms 3788 KB Output is correct
10 Correct 59 ms 4108 KB Output is correct
11 Correct 55 ms 4128 KB Output is correct
12 Correct 58 ms 4272 KB Output is correct
13 Correct 56 ms 4292 KB Output is correct
14 Execution timed out 2039 ms 5808 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Execution timed out 2081 ms 5580 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 312 KB Output is correct
20 Incorrect 1 ms 340 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 36 ms 3788 KB Output is correct
11 Correct 59 ms 4108 KB Output is correct
12 Correct 55 ms 4128 KB Output is correct
13 Correct 58 ms 4272 KB Output is correct
14 Correct 56 ms 4292 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 312 KB Output is correct
25 Incorrect 1 ms 340 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 36 ms 3788 KB Output is correct
10 Correct 59 ms 4108 KB Output is correct
11 Correct 55 ms 4128 KB Output is correct
12 Correct 58 ms 4272 KB Output is correct
13 Correct 56 ms 4292 KB Output is correct
14 Execution timed out 2039 ms 5808 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 36 ms 3788 KB Output is correct
11 Correct 59 ms 4108 KB Output is correct
12 Correct 55 ms 4128 KB Output is correct
13 Correct 58 ms 4272 KB Output is correct
14 Correct 56 ms 4292 KB Output is correct
15 Execution timed out 2039 ms 5808 KB Time limit exceeded
16 Halted 0 ms 0 KB -