Submission #1216526

#	Time	Username	Problem	Language	Result	Execution time	Memory
1216526		bangan	Radio Towers (IOI22_towers)	C++20	0 / 100	198 ms	1684 KiB

towers

#include "towers.h"
#include <bits/stdc++.h>
using namespace std;

#define pb push_back

int i;
vector<int> h;

void init(int N, std::vector<int> H) {
  while (i+1 < N && H[i] < H[i+1]) i++;
  for (int i=0; i<N; i++) h.pb(H[i]);
}

int max_towers(int L, int R, int D) {
  if (R<=i || L>=i) return 0;
  int lo = L-1, hi = i;
  while (hi-lo > 1) {
    int mid = (lo+hi) / 2;
    h[mid] <= h[i]-D ? lo = mid : hi = mid;
  }
  int ans = 0;
  if (lo >= L) ans += lo-L+1;
  lo = i, hi = R+1;
  while (hi-lo > 1) {
    int mid = (lo+hi) / 2;
    h[mid] <= h[i]-D ? hi = mid : lo = mid;
  }
  if (hi <= R) ans += R-hi+1;
  return ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23