Submission #574960

#	Time	Username	Problem	Language	Result	Execution time	Memory
574960		KrisjanisP	Finding Routers (IOI20_routers)	C++14	100 / 100	1 ms	336 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) {
  vector<int> res(n,l-(l%2));
  res[0]=0;
  for(ll i=1;i<n;i++)
  {
    ll a = (res[i-1]+1), b = res[i];
    res[i] = b;
    while(a<=b)
    {
      ll m = (a+b)/2;
      ll x = use_detector(m);
      for(ll j=i;j<=x;j++)
        res[j]=min((ll)res[j],m); 
      if(x<i) a=m+1;
      else b=m-1;
    }
    //cout<<"res[i]: "<<res[i]<<"\n";
    res[i] = 2*res[i]-res[i-1]-2;
  }
  return res;
}

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