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Submission #977102

# Submission time Handle Problem Language Result Execution time Memory
977102 2024-05-07T11:42:56 Z dubabuba Bridges (APIO19_bridges) C++14
0 / 100
 124 ms 11340 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pii;
#define ff first
#define ss second
#define MP make_pair

const int mxn = 2e5 + 10;
int par[mxn], ans[mxn], n, m;
vector<pair<int, pii>> edges;

int parent(int u) {
	if(par[u] < 0) return u;
	return par[u] = parent(par[u]);
}

bool unite(int u, int v) {
	u = parent(u);
	v = parent(v);
	if(u == v) return 0;

	if(par[u] > par[v]) swap(u, v);
	par[u] += par[v];
	par[v] = u;
	return 0;
}

int main() {
	cin >> n >> m;
	for(int i = 0; i < m; i++) {
		int u, v, w;
		cin >> u >> v >> w;
		edges.push_back(MP(-w, MP(u, v)));
	}

	int q;
	cin >> q;
	for(int i = 1; i <= q; i++) {
		int s, w;
		cin >> s >> w;
		edges.push_back(MP(-w, MP(-i, s)));
	}

	sort(edges.begin(), edges.end());
	memset(par, -1, sizeof par);

	for(auto p : edges) {
		if(p.ss.ff > 0) {
			int w = p.ff;
			int u = p.ss.ff;
			int v = p.ss.ss;
			unite(u, v);
		}
		else {
			int w = p.ff;
			int i = -p.ss.ff;
			int s = p.ss.ss;
			ans[i] = par[parent(s)];
		}
	}

	for(int i = 1; i <= q; i++)
		cout << ans[i] << endl;
	return 0;
}

Compilation message

bridges.cpp: In function 'int main()':
bridges.cpp:50:8: warning: unused variable 'w' [-Wunused-variable]
   50 |    int w = p.ff;
      |        ^
bridges.cpp:56:8: warning: unused variable 'w' [-Wunused-variable]
   56 |    int w = p.ff;
      |        ^

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 94 ms 9396 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Runtime error 74 ms 8268 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 124 ms 11340 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 94 ms 9396 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -