B"Uh oh! Ray lost his array yet again! However, Omkar might be able to help because he thinks he has found the OmkArray of Ray's array. The OmkArray of an array a with elements a_1, a_2, ldots, a_{2k-1} , is the array b with elements b_1, b_2, ldots, b_{k} such that b_i is equal to the median of a_1, a_2, ldots, a_{2i-1} for all i . Omkar has found an array b of size n ( 1 <= q n <= q 2 cdot 10^5 , -10^9 <= q b_i <= q 10^9 ). Given this array b , Ray wants to test Omkar's claim and see if b actually is an OmkArray of some array a . Can you help Ray? The median of a set of numbers a_1, a_2, ldots, a_{2i-1} is the number c_{i} where c_{1}, c_{2}, ldots, c_{2i-1} represents a_1, a_2, ldots, a_{2i-1} sorted in nondecreasing order. Each test contains multiple test cases. The first line contains a single integer t ( 1 <= q t <= q 10^4 ) -- the number of test cases. Description of the test cases follows. The first line of each test case contains an integer n ( 1 <= q n <= q 2 cdot 10^5 ) -- the length of the array b . The second line contains n integers b_1, b_2, ldots, b_n ( -10^9 <= q b_i <= q 10^9 ) -- the elements of b . It is guaranteed the sum of n across all test cases does not exceed 2 cdot 10^5 . For each test case, output one line containing YES if there exists an array a such that b_i is the median of a_1, a_2, ... , a_{2i-1} for all i , and NO otherwise. The case of letters in YES and NO do not matter (so yEs and No will also be accepted). In the second case of the first sample, the array [4] will generate an OmkArray of [4] , as the median of the first element is 4 . In the fourth case of the first sample, the array [3, 2, 5] will generate an OmkArray of [3, 3] , as the median of 3 is 3 and the median of 2, 3, 5 is"...