Submission #1259031

#	Time	Username	Problem	Language	Result	Execution time	Memory
1259031		tamzid	Finding Routers (IOI20_routers)	C++20	100 / 100	1 ms	584 KiB

routers

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

const int N = 1e5 + 5;
vector<int> memo(N, -1);

std::vector<int> find_routers(int l, int n, int q) {
    vector<int> ans;
    ans.push_back(0);
    for(int i=0;i<n-1;++i)
    {
      int low = 0, high = l, cc = -1;
      while(low <= high)
      {
        int m = (low + high) / 2;
        int idx;
        if(memo[m] == -1)
        {
          memo[m] = use_detector(m);
        }
        idx = memo[m];
        if(idx <= i)
        {
          low = m + 1;
        }
        else
        {
          cc = m;
          high = m - 1;
        }
      }
      int dis = cc - ans.back();
      --dis;
      ans.push_back(ans.back() + (dis * 2));
    }
    return ans;
}

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