#JGY104. 按位异或1
按位异或1
当前没有测试数据。
Background
给定两个正整数 和 ,请你求出:
$$\left(\sum\limits_{x_1=0}^{n}\sum\limits_{x_2=0}^{m}x_1\;\text{xor}\;x_2\right)\!\!\!\!\!\mod 998244353 $$的值。
Description
Given two integers x and y, print the sum.
Format
Input
Two integers x and y, satisfying .
Output
One integer, the sum of x and y.
Samples
123 500
623
Limitation
1s, 1024KiB for each test case.