oj.uz

Submission #746061

# Submission time Handle Problem Language Result Execution time Memory
746061 2023-05-21T10:57:35 Z vjudge1 Event Hopping (BOI22_events) C++17
0 / 100
 223 ms 10008 KB 
#include <bits/stdc++.h>
using namespace std;

struct Event {
	int s, e, idx;
};

int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	int n, q; cin >> n >> q;
	vector<Event> events(n);
	int j = 0;
	for (Event &i : events) {
		cin >> i.s >> i.e;
		i.idx = ++j;
	}
	vector<Event> old = events;
	sort(events.begin(), events.end(), [&](Event a, Event b) {
		if (a.e == b.e) return a.s < b.s;
		return a.e < b.e;
	});
	
	map<int, pair<int, int>> m;
	int segment = 1;
	for (int i = 0; i < n; i++) {
		if (i && (events[i].s > events[i-1].e || events[i-1].e > events[i].e)) segment++;
		m[events[i].idx] = {i, segment};
	}
	while (q--) {
		int a, b; cin >> a >> b;
		if (old[a-1].e == old[b-1].e) {
			cout << 1 << "\n";
			continue;
		}
		if (m[a].second != m[b].second) {
			cout << "impossible\n";
			continue;
		}
		a = m[a].first; b = m[b].first;
		if (a > b) cout << "impossible\n";
		else cout << b-a << "\n";
	}
	return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 9488 KB Output is correct
2 Correct 137 ms 9432 KB Output is correct
3 Correct 223 ms 9428 KB Output is correct
4 Correct 123 ms 10008 KB Output is correct
5 Incorrect 176 ms 9832 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -