H. Huashui Clock - 2019 年 “游族杯” 上海市高校程序设计邀请赛 (同步赛) - ECNU Online Judge

你可以在这里下载。

单点时限: 1.0 sec

内存限制: 1024 MB

样例

Input

2 2

Output

3/4

Input

2 7

Output

13/14

Input

7 2

Output

3/14

Input

13 11

Output

6/13

Input

100 33

Output

17/100

Input

100005 100009

Output

50007/100009

Input

1000000000 2

Output

3/2000000000

Input

2 999999999

Output

1999999997/1999999998

Input

914067307 998244353

Output

541210700/998244353

NaN

A. As Much As 996 B. Black Peter C. Coprime-Free Permutation D. Distinct Tautonyms E. ECNU MNIST F. Foreigners’ Trouble G. Green-Red Tree H. Huashui Clock I. Induced Metric Space J. Josephus Problem K. Keyboard without Binary Digits L. Liwa River