Submission #1230198

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230198		zerone.	Finding Routers (IOI20_routers)	C++20	70.13 / 100	1 ms	328 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[n+3];
  for(int i = 0; i < n+3; ++i) curr[i] = -1;
  curr[0] = 0;
  for(int i = 1; i < n; ++i){
    int L = max(ans.back(), curr[i-1]);
    int R = l;
    int idx = -1;
    while(L <= R){
      int mid = (L+R)/2;
      int dist = use_detector(mid);
      curr[dist] = max(curr[dist], mid);
      if(dist > i-1){
        R = mid-1;
      } else{
        idx = mid;
        L = mid+1;
      }
    }
    curr[i-1] = idx;
    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: 10.1344 / 40