Submission #915013

#	Time	Username	Problem	Language	Result	Execution time	Memory
915013		happypotato	Collecting Stamps 3 (JOI20_ho_t3)	C++17	0 / 100	1 ms	500 KiB

ho_t3

#include <bits/stdc++.h>
using namespace std;
#define int long long
int32_t main() {
	ios::sync_with_stdio(0); cin.tie(0);
	int n, l;
	cin >> n >> l;
	int x[n];
	for (int i = 0; i < n; i++) cin >> x[i];
	int t[n];
	for (int i = 0; i < n; i++) cin >> t[i];
	int ans = 0;
	for (int sl = 0; sl <= n; sl++) {
		for (int sr = 0; sl + sr <= n; sr++) {
			int cost;
			int cur1 = 0; cost = (sl == 0 ? 0 : x[sl - 1]) * 2;
			for (int i = 0; i < sl; i++) cur1 += (x[i] <= t[i]);
			for (int i = n - 1; i >= n - sr; i--) cur1 += (cost + (l - x[i]) <= t[i]);
			int cur2 = 0; cost = (sr == 0 ? 0 : x[n - sr]) * 2;
			for (int i = n - 1; i >= n - sr; i--) cur2 += ((l - x[i]) <= t[i]);
			for (int i = 0; i < sl; i++) cur2 += ((cost + x[i]) <= t[i]);
			ans = max(ans, max(cur1, cur2));
		}
	}
	cout << ans << '\n';
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75