题目链接:http://codeforces.com/contest/617/problem/E 题意:给出一个长度为n(1e5)的序列,有m(1e5)次操作,每次操作选择一个L-R区间,然后输出符合条件的i,j的个数:L<i<j<R,ai^a------^aj=k,k是一个给定的值 题解:莫队可做,首先,求一个前缀异或和,如果求ai^……^a[j]的值,那么sum[j]^sum[i-1].莫队的思想是已知道[L,R]的值,可以在O(1)的时间内算出[L-1,R],[L,R-1]等等的值…

XOR and Favorite Number time limit per test: 4 seconds memory limit per test: 256 megabytes input: standard input output: standard output Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pa…

E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pai…

E. XOR and Favorite Number 题目连接: http://www.codeforces.com/contest/617/problem/E Descriptionww.co Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pair li and ri and asks you to count the n…

E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pai…

CF617E XOR and Favorite Number 已知一个序列 \(a_1,\ a_2,\ \cdots,\ a_n\) 和 \(k\) ,\(m\) 次询问给出 \(l,\ r\) ,求 \(\displaystyle\sum_{i=l}^r\sum_{j=i}^r[a_x\oplus a_{x+1}\oplus \cdots \oplus a_y=k]\) \(n,\ m\leq10^5,\ 0\leq a_i,\ k\leq10^6\) 莫队 重题 bzoj5301 [CQOI…

E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pai…

任意门:http://codeforces.com/problemset/problem/617/E E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks yo…

题目链接: E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by…

题目链接:http://codeforces.com/problemset/problem/617/E E. XOR and Favorite Number time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bob has a favorite number k and ai of length n. Now he asks y…