diff --git a/Luogu/P4735/P4735.cpp b/Luogu/P4735/P4735.cpp new file mode 100644 index 00000000..eb7f7bc5 --- /dev/null +++ b/Luogu/P4735/P4735.cpp @@ -0,0 +1,87 @@ +#include + +using std::cin; +using std::cout; +const char endl = '\n'; + +const int N = 6e5 + 5; + +int n, m, sum; +int cnt, tot, root[N], lst[N], tr[N << 5][2], siz[N << 5]; + +void insert(int val) { + root[++tot] = ++cnt; + + int l = root[tot - 1], r = root[tot]; + + for (int i = 30; i >= 0; i--) { + bool x = val >> i & 1; + + tr[r][x ^ 1] = tr[l][x ^ 1]; + tr[r][x] = ++cnt; + + l = tr[l][x]; + r = tr[r][x]; + + siz[r] = siz[l] + 1; + } + + lst[tot] = cnt; +} + +int query(int l, int r, int val) { + int res = 0; + + l = root[l], r = root[r]; + + for (int i = 30; i >= 0; i--) { + bool x = val >> i & 1; + + if (siz[tr[r][x ^ 1]] > siz[tr[l][x ^ 1]]) { + res |= 1 << i; + x = x ^ 1; + } + + l = tr[l][x]; + r = tr[r][x]; + } + + return res; +} + +int main() { + std::ios::sync_with_stdio(false); + cin.tie(nullptr); + + cin >> n >> m; + + insert(0); + + for (int i = 1, x; i <= n; i++) { + cin >> x; + + insert(sum ^= x); + } + + while (m--) { + char op; + + cin >> op; + + if (op == 'A') { + int x; + + cin >> x; + + insert(sum ^= x); + } else { // op == 'Q' + int l, r, x; + + cin >> l >> r >> x; + + cout << query(l - 1, r, x ^ sum) << endl; + } + } + + return 0; +}