Submission #1201023

#	Time	Username	Problem	Language	Result	Execution time	Memory
1201023		YouKnowCipher	Finding Routers (IOI20_routers)	C++20	78.01 / 100	1 ms	588 KiB

routers

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

vector<int> memo;

int search (int i, int n, int k) {
	int l = i, r = n, ans;
	while (l <= r) {
		int mid = (l + r) >> 1;
		if (memo[mid] == -1) memo[mid] = use_detector(mid);
		if (memo[mid] >= k) {
			ans = mid;
			r = mid - 1;
		} else {
			l = mid + 1;
		}
	}
	return 2 * (ans - 1) - i;
}

vector<int> find_routers (int l, int n, int q) {
    vector<int> ans;
    ans.push_back(0);
    memo.assign(l + 1, -1);
    memo[0] = 0;
    while (ans.size() != n) {
    	int route = search(ans.back(), l, (int) ans.size());
    	ans.push_back(route);
    }
	return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 18.0096 / 40