Submission #745898

#	Time	Username	Problem	Language	Result	Execution time	Memory
745898		vjudge1	Event Hopping (BOI22_events)	C++17	0 / 100	131 ms	6752 KiB

events

#include <bits/stdc++.h>
using namespace std;

const int MAXN = 100001;
const int K = 20;

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;
	}
	sort(events.begin(), events.end(), [&](Event a, Event b) {
		return a.s < b.s;
	});
	map<int, int> m;
	for (int i = 0; i < n; i++) {
		m[events[i].idx] = i;
	}
	while (q--) {
		int a, b; cin >> a >> b;
		a = m[a]; b = m[b];
		if (a > b) cout << "impossible\n";
		else cout << b-a << "\n";
	}
	return 0;
}
 

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30