Submission #424469

#	Time	Username	Problem	Language	Result	Execution time	Memory
424469		iraira655	Finding Routers (IOI20_routers)	C++17	0 / 100	1 ms	460 KiB

routers

#include "routers.h"
#include <iostream>
#include <vector>

using namespace std;
 
vector<int> find_routers(int l, int n, int q) {
  vector<int> ans;
  ans.push_back(0);
  
  int prev = 0, check = 0, mid = 0, lo =0, hi = l, c =0;

int asd = 0;

  for(int next=1; next<n; next++){
    lo = ans[next-1], hi = l;
    asd = 0;
    while(lo<hi && asd <=20){
      mid = lo + (hi-lo)/2;
      check = use_detector(mid);
      asd ++;
      //cout<<hi<<" "<<lo<<" "<<mid<<" "<<check<<" "<<prev<<" cur: "<<asd<<"\n";
      if(check == prev){
        c = use_detector(mid+1);
        if(c == next){
          ans.push_back(mid*2 - ans[next-1]);
          lo = mid+1;
          prev = next;
          break;
        }
      }
      else{
          hi = mid;
        }
    }
  }
  
	return ans;
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 40