View Code of Problem 6

number = int(input())
rest = [0 for i in range(number)]
tell_fast = [0 for i in range(number)]
while number:
    # print("number:", number)
    arry_number = int(input())
    arry_rest = arry_number
    while arry_number:
        a, b = input().split()
        if tell_fast[abs(number-2)] == 0:
            tell_fast[abs(number-2)] = int(b) - int(a)
        # arry_rest.append(b)
        if int(b)-int(a) == tell_fast[abs(number-2)]:
            rest[abs(number-2)] = 'YES'
        else:
            rest[abs(number-2)] = 'NO'
            # print(arry_number)

        arry_number = arry_number - 1
        # print("arry_number:", arry_number)
    # rest.append(arry_rest[-1])
    number = number - 1

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