Submission #1295789

#	Time	Username	Problem	Language	Result	Execution time	Memory
1295789		SabaKharebava	Obstacles for a Llama (IOI25_obstacles)	C++20	10 / 100	1170 ms	2162688 KiB

obstacles

#include<bits/stdc++.h>

using namespace std;

vector<vector<int>> mp, l;

void initialize(vector<int> t, vector<int> h) {
	mp.resize(t.size(), vector<int> (h.size(), 0));
	l.resize(t.size(), vector<int> (h.size(), -1));
	for (int i = 0; i < t.size(); i++)
		for (int j = 0; j < h.size(); j++)
			if (h[j] >= t[i])
				mp[i][j] = 1;
	auto dfs = [&](auto& dfs, int i, int j, int val) -> void {
		if (i < 0 || i >= t.size() || j >= h.size() || l[i][j] != -1 || mp[i][j] == 1) {
			return;
		}
		l[i][j] = val;
		dfs(dfs, i-1, j, val);
		dfs(dfs, i+1, j, val);
		dfs(dfs, i, j+1, val);
	};
	for (int i = 0; i < h.size(); i++)
		dfs(dfs, 0, i, i);
}

bool can_reach(int ll, int r, int s, int d) {
	if (d < s)
		swap(d, s);
	return (l[0][d] <= s);
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 21
• Subtask 5: 0 / 25
• Subtask 6: 0 / 17