View Code of Problem 6

number = int(input())
rest = ['', '']
while number:
    # print("number:", abs(number-2))
    arry_number = int(input())
    arry_rest = arry_number
    while arry_number:
        a, b = input().split()
        # arry_rest.append(b)
        if int(b) == arry_rest:
            rest[abs(number-2)] = 'YES'
        else:
            rest[abs(number-2)] = 'NO'
            # print(arry_number)
        # print(arry_rest)
        arry_number = arry_number - 1
    # rest.append(arry_rest[-1])
    number = number - 1

# print(rest)
for _ in rest:
    print(_)