Submission #135916

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
135916	2019-07-24 13:31:30	model_code	Non-boring sequences (CERC12_D)	C++11	1 / 1	416 ms	10488 KiB

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// CERC 2012
// Problem D: Non-boring sequences
// Model solution. O(n lg n)
// Author: Adam Polak
#include <algorithm>
#include <iostream>
using namespace std;
#define prev Prev
#define next Next
const int MAXN = 200000;
int n, a[MAXN], values[MAXN];
int prev[MAXN], next[MAXN], last[MAXN];
bool IsBoring(int beg, int end) {
  if (beg == end) return false;
  for (int i = 0; i < (end - beg); ++i) {
    int mid = ((i & 1) ? beg + i / 2 : end - 1 - i / 2);
    if (prev[mid] < beg && next[mid] >= end)
      return IsBoring(beg, mid) || IsBoring(mid+1, end);
  }
  return true;
}
int main() {
  ios_base::sync_with_stdio(false);
  int T;
 
 
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