Submission #24,149

2026-02-04 23:16:27

python3

Accepted 75/75

90ms

15252 KiB

from sys import stdin
input=stdin.readline

from collections import deque 

def solv():
    N = int(input())
    S = list(map(int,input().split()))

    MEL = deque([])
    RES = [0]

    for i in range(N):
        if S[i] == RES[-1]+1:
            RES.append(S[i])
        else:
            MEL.appendleft(S[i])
        while len(MEL)>0 and MEL[-1]==RES[-1]+1:
            RES.append(MEL.pop())
            
            

    print(RES[-1])


solv()

	Sum	Test	Verdict	Time	Memory
subtask1	0/0
subtask1	0/0	1	Accepted	17ms	3380 KiB
subtask2	6/6
		2	Accepted	19ms	3368 KiB
		3	Accepted	19ms	3380 KiB
		4	Accepted	18ms	3376 KiB
		5	Accepted	18ms	3312 KiB
		6	Accepted	19ms	3380 KiB
		7	Accepted	18ms	3400 KiB
subtask3	21/21
		8	Accepted	19ms	3396 KiB
		9	Accepted	18ms	3488 KiB
		10	Accepted	18ms	3492 KiB
		11	Accepted	19ms	3448 KiB
		12	Accepted	18ms	3488 KiB
		13	Accepted	17ms	3508 KiB
		14	Accepted	19ms	3324 KiB
		15	Accepted	18ms	3476 KiB
		16	Accepted	18ms	3300 KiB
		17	Accepted	17ms	3380 KiB
		18	Accepted	19ms	3380 KiB
		19	Accepted	17ms	3388 KiB
		20	Accepted	17ms	3368 KiB
		21	Accepted	19ms	3384 KiB
		22	Accepted	18ms	3392 KiB
		23	Accepted	17ms	3272 KiB
		24	Accepted	19ms	3380 KiB
		25	Accepted	19ms	3492 KiB
		26	Accepted	18ms	3328 KiB
		27	Accepted	18ms	3380 KiB
		28	Accepted	17ms	3564 KiB
subtask4	24/24
		29	Accepted	19ms	3552 KiB
		30	Accepted	20ms	3380 KiB
		31	Accepted	19ms	3368 KiB
		32	Accepted	19ms	3828 KiB
		33	Accepted	18ms	3728 KiB
		34	Accepted	19ms	3396 KiB
		35	Accepted	19ms	3552 KiB
		36	Accepted	20ms	3380 KiB
		37	Accepted	19ms	3372 KiB
		38	Accepted	18ms	3456 KiB
		39	Accepted	18ms	3536 KiB
		40	Accepted	18ms	3380 KiB
		41	Accepted	20ms	3380 KiB
		42	Accepted	19ms	3380 KiB
		43	Accepted	19ms	3516 KiB
		44	Accepted	19ms	3576 KiB
		45	Accepted	19ms	3548 KiB
		46	Accepted	19ms	3356 KiB
		47	Accepted	18ms	3432 KiB
		48	Accepted	18ms	3452 KiB
		49	Accepted	19ms	3384 KiB
		50	Accepted	19ms	3380 KiB
		51	Accepted	19ms	3384 KiB
		52	Accepted	19ms	3400 KiB
subtask5	24/24
		53	Accepted	75ms	14840 KiB
		54	Accepted	76ms	14892 KiB
		55	Accepted	81ms	14836 KiB
		56	Accepted	83ms	14832 KiB
		57	Accepted	83ms	14836 KiB
		58	Accepted	87ms	14960 KiB
		59	Accepted	83ms	15028 KiB
		60	Accepted	78ms	14836 KiB
		61	Accepted	78ms	14864 KiB
		62	Accepted	83ms	14828 KiB
		63	Accepted	87ms	14888 KiB
		64	Accepted	86ms	15252 KiB
		65	Accepted	90ms	14852 KiB
		66	Accepted	90ms	15000 KiB
		67	Accepted	87ms	15056 KiB
		68	Accepted	87ms	14940 KiB
		69	Accepted	76ms	14832 KiB
		70	Accepted	82ms	14836 KiB
		71	Accepted	86ms	14960 KiB
		72	Accepted	82ms	14836 KiB
		73	Accepted	86ms	14836 KiB
		74	Accepted	82ms	14904 KiB
		75	Accepted	82ms	14908 KiB
		76	Accepted	87ms	14836 KiB