Submission #559546

#	Time	Username	Problem	Language	Result	Execution time	Memory
559546		ahmet34	Finding Routers (IOI20_routers)	C++14	94.25 / 100	2 ms	328 KiB

routers

#include <bits/stdc++.h>
#include "routers.h"
using namespace std;
 
using ll = long long;
using pii = pair<int, int>;
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

const int INF = 2e9, N = 2e5+15, M = 998244353, LOG = 16;
const ll LINF = 1e18;


vector<int> find_routers(int l, int n, int q) {
	vector<int> R(n, l);
	vector<int> ans {0};

	for(int i = 1; i < n; i++) 
	{
		int s = ans.back()+1, e = R[i];
		
		while(s < e) {
			int m = (s + e + 1) / 2;
			int cur = use_detector(m);
			if(cur > i-1) {
				--cur;
				e = m-1;
				R[cur] = min(R[cur], m);
			}
			else s = m;
			q--;
		}
		ans.push_back(ans.back() + 2 * (s - ans.back()));
	}
	assert(q >= 0);
	return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 34.2496 / 40