라인 스위핑 import sys input = sys.stdin.readline N = int(input()) lines = [list(map(int, input().split())) for _ in range(N)] lines.sort() answer = 0 left = right = 0 for start, end in lines: if not answer: answer = abs(end - start) left = start right = end continue # 여기가 스위핑문. 조건에서 벗어나는 라인은 조사 x if left = end: continue answer += abs(end - start) if right > start: answer -= abs(right - start) left =..