Submission #1230283

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230283		zerone.	Finding Routers (IOI20_routers)	C++20	100 / 100	1 ms	584 KiB

routers

#include "routers.h"
#define pb push_back
using namespace std;

std::vector<int> find_routers(int l, int n, int q) {
  vector<int> ans;
  ans.pb(0);
  int curr[l+3];
  for(int i = 0; i < l+3; ++i) curr[i] = -1;
  curr[0] = 0;
  for(int i = 1; i < n; ++i){
    int L = 0;
    int R = l;
    int idx = -1;
    while(L <= R){
      int mid = (L+R)/2;
      int dist;
      if(curr[mid]==-1) curr[mid] = use_detector(mid);
      dist = curr[mid];
      if(dist <= i-1){
        L = mid+1;
        idx = mid;
      } else R = mid-1;
    }
    int z = idx+idx-ans.back();
    ans.pb(z);
    
  }
  return ans;
}

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