Submission #347046

#	Time	Username	Problem	Language	Result	Execution time	Memory
347046		Pety	Finding Routers (IOI20_routers)	C++14	78.01 / 100	2 ms	768 KiB

routers

#include <bits/stdc++.h>
#include "routers.h"

using namespace std;

int answer[100002];
int ask (int x) {
  if (answer[x] != -1)
    return answer[x];
  return answer[x] = use_detector(x);
}

vector<int> find_routers (int l, int n, int q) {
  vector<int>p;
  p.resize(n);
  memset(answer, -1, sizeof(answer));
  for (int i = 1; i < n; i++) {
    int st = p[i - 1], dr = l, poz = 0;
    while (st <= dr) {
      int mij = (st + dr) / 2;
      if (ask(mij) == i - 1) {
        st = mij + 1;
        poz = mij;
      }
      else
        dr = mij - 1;
    }
    p[i] = p[i - 1] + 2* (poz - p[i - 1]);
  }
  return p;
}

/*int main () {
  return 0;
}*/

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