Submission #574920

#	Time	Username	Problem	Language	Result	Execution time	Memory
574920		KrisjanisP	Finding Routers (IOI20_routers)	C++14	70.13 / 100	2 ms	300 KiB

routers

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

std::vector<int> find_routers(int l, int n, int q) {
  //cout<<"l: "<<l<<"\n";
  vector<int> res(n,0);
  for(ll i=1;i<n;i++)
  {
    ll a = res[i-1], b = l;
    while(a<=b)
    {
      ll m = (a+b)/2;
      ll x = use_detector(m);
      if(x<i) a=m+1;
      else if(x==i) {
        res[i] = m;
        b = m-1;
      }
      else b=m-1;
    }
    res[i] = res[i-1]+2*(res[i]-res[i-1]-1);
  }
  //cout<<"res: "; for(ll x: res) cout<<x<<" "; cout<<"\n";
  return res;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 10.1312 / 40