blob: f7086d32254194824f7e3df4073f8db1ae3bf908 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
T = int(input())
for test in range(T):
N = int(input())
order = []
for i in range(N):
car = int(input())
order.append(car)
branch = []
next_ingredient = 1
while True:
if len(branch) == 0 and len(order) == 0:
print("Y")
break
if len(order) > 0 and next_ingredient == order[-1]:
next_ingredient += 1
del order[-1]
elif len(branch) > 0 and branch[-1] == next_ingredient:
next_ingredient += 1
del branch[-1]
else:
if len(order) > 0:
branch.append(order[-1])
del order[-1]
else:
print("N")
break
|
