11650 좌표 정렬하기

Python

def main():
    testcase = int(input())
    numbers = []

    for _ in range(testcase):
        numbers.append(list(map(int, input().split())))
    
    for number in sorted(numbers, key=lambda x: (x[0], x[1])):
        print(" ".join([str(n) for n in number]))


main()