Submission #798221

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
798221	2023-07-30 13:43:58	hungnt	Non-boring sequences (CERC12_D)	C++14	1 / 1	284 ms	17096 KiB

D

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#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
int n;
int a[N], b[N], pos[N];
int low[N], high[N];
bool boring(int L, int R)
{
    if(L >= R) return 0;
    int curL = L, curR = R;
    bool x = 0;
    while(curL <= curR)
    {
        if (!x)
        {
            if (low[curL] < L && high[curL] > R)
            return boring(L, curL - 1) || boring(curL + 1, R);
            ++curL;
        }
        else {
          if (low[curR] < L && high[curR] > R)
            return boring(L, curR - 1) || boring(curR + 1, R);
          --curR;
        }
        x ^= 1;
    }
    return 1;
 
 
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