www.acmicpc.net/problem/17976 17976번: Thread Knots Your program is to read from standard input. The input starts with a line containing one integer, n (2 ≤ n ≤ 100,000), where n is the number of threads. In the following n lines, the i-th line contains two integers xi (0 ≤ xi ≤ 109) and li (1 ≤ www.acmicpc.net 시간 제한 메모리 제한 제출 정답 맞은 사람 정답 비율 1 초 512 MB 776 271 172 29.503% 문제 There are n threads o..