题解_Atcoder_Xor Sum 2

题解_Atcoder_Xor Sum 2
1：题意
Problem Statement
There is an integer sequence A of length N.
Find the number of the pairs of integers l and r (

1

≤

l

≤

r

≤

N

1 /leq l /leq r /leq N

1≤l≤r≤N)

题解_Atcoder_Xor Sum 2最先出现在Python成神之路。