Submission #1201438

#	Time	Username	Problem	Language	Result	Execution time	Memory
1201438		ezzzay	Finding Routers (IOI20_routers)	C++20	78.01 / 100	1 ms	840 KiB

routers

#include "routers.h" 
#include<bits/stdc++.h>
using namespace std;
const int N=1e6;
bool vis[N];
int P[N];
int fun(int x){
  if(vis[x]){
    return P[x];
  }
  vis[x]=1;
  return P[x]= use_detector(x);
}
std::vector<int> find_routers(int l, int n, int q) {
	vector<int>v={0};
	for(int i=1;i<n;i++){
		int lo=v.back(),hi=l;
		while(hi>=lo){
			int mid=(hi+lo)/2;
			int idx = fun(mid);
			if(idx<i){
				lo=mid+1;
			}
			else{
				hi=mid-1;
			}
		}
		v.push_back(hi*2-v.back());
	}
	return v;
}

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