#P15118. [ICPC 2024 LAC] DiviDuelo

    ID: 17029 远端评测题 500ms 1024MiB 尝试: 0 已通过: 0 难度: 6 上传者: 标签>数学2024素数判断,质数,筛法ICPC分类讨论

[ICPC 2024 LAC] DiviDuelo

题目描述

The Intense Challenges Players Club (ICPC) is hosting a DiviDuelo tournament.

DiviDuelo is a new two-player, turn-based game. In DiviDuelo, a number NN is selected and the list of its divisors is written. For example, if N=10N = 10 is selected, the list of numbers 1,2,5,101, 2, 5, 10 is written. Players alternate turns picking one still unpicked divisor from the list each turn, until all divisors have been picked.

The winner is determined by the greatest common divisor (GCD) of the numbers picked by the starting player. If the GCD is not equal to 1, the starting player wins. Otherwise, if the GCD is equal to 1, the other player wins.

The ICPC needs your help to prepare some statistics about the games played in the tournament. Given the value of NN, determine if the starting player can win the game assuming both players play optimally.

输入格式

The input consists of a single line that contains an integer NN (1N10121 \le N \le 10^{12}) indicating the number selected for the game.

输出格式

Output a single line with the uppercase letter "Y" if the starting player can win the game and the uppercase letter "N" otherwise, assuming both players play optimally.

10
Y
9
N
1
N