Submission #862320

#	Time	Username	Problem	Language	Result	Execution time	Memory
862320		TAhmed33	Osumnjičeni (COCI21_osumnjiceni)	C++98	0 / 110	78 ms	8140 KiB

Main

#include <bits/stdc++.h>
using namespace std;
bool intersect (pair <int, int> a, pair <int, int> b) {
	return !(a.second < b.first || b.second < a.first);
}
int main () {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	pair <int, int> arr[n + 1];
	for (int i = 1; i <= n; i++) cin >> arr[i].first >> arr[i].second;
	int nxt[n + 1] = {};
	nxt[n] = n;
	for (int i = n - 1; i >= 1; i--) {
		nxt[i] = n;
		for (int j = i + 1; j <= n; j++) {
			if (intersect(arr[i], arr[j])) {
				nxt[i] = j - 1;
				break;
			}
		}
		nxt[i] = min(nxt[i], nxt[i + 1]);
	}
	int q;
	cin >> q;
	while (q--) {
		int l, r;
		cin >> l >> r;
		vector <int> d;
		for (int i = l; i <= r; i++) {
			d.push_back(min(r, nxt[i]));
		}
		int dp[(int)(d.size())] = {};
		for (int j = (int)d.size() - 1; j >= 0; j--) {
			if (d[j] == r) {
				dp[j] = 1;
				continue;
			}
			dp[j] = 1e9;
			for (int i = j; i <= nxt[j]; i++) {
				dp[j] = min(dp[j], dp[i + 1]);
			}
			dp[j]++;
		}
		cout << dp[0] << '\n';
	}
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 50