From 3f5ea197e0e9a133a94aa6fc38351570dbe73b95 Mon Sep 17 00:00:00 2001
From: Baoshuo <i@baoshuo.ren>
Date: Fri, 30 Dec 2022 22:31:48 +0800
Subject: [PATCH] =?UTF-8?q?#6850.=20=E6=9C=80=E5=A4=A7=E5=BC=82=E6=88=96?=
 =?UTF-8?q?=E5=92=8C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

https://loj.ac/s/1661199
---
 LibreOJ/6850/6850.cpp    | 87 ++++++++++++++++++++++++++++++++++++++++
 LibreOJ/6850/data/1.in   |  3 ++
 LibreOJ/6850/data/1.out  |  3 ++
 LibreOJ/6850/data/10.in  |  3 ++
 LibreOJ/6850/data/10.out |  3 ++
 LibreOJ/6850/data/2.in   |  3 ++
 LibreOJ/6850/data/2.out  |  3 ++
 LibreOJ/6850/data/3.in   |  3 ++
 LibreOJ/6850/data/3.out  |  3 ++
 LibreOJ/6850/data/4.in   |  3 ++
 LibreOJ/6850/data/4.out  |  3 ++
 LibreOJ/6850/data/5.in   |  3 ++
 LibreOJ/6850/data/5.out  |  3 ++
 LibreOJ/6850/data/6.in   |  3 ++
 LibreOJ/6850/data/6.out  |  3 ++
 LibreOJ/6850/data/7.in   |  3 ++
 LibreOJ/6850/data/7.out  |  3 ++
 LibreOJ/6850/data/8.in   |  3 ++
 LibreOJ/6850/data/8.out  |  3 ++
 LibreOJ/6850/data/9.in   |  3 ++
 LibreOJ/6850/data/9.out  |  3 ++
 21 files changed, 147 insertions(+)
 create mode 100644 LibreOJ/6850/6850.cpp
 create mode 100644 LibreOJ/6850/data/1.in
 create mode 100644 LibreOJ/6850/data/1.out
 create mode 100644 LibreOJ/6850/data/10.in
 create mode 100644 LibreOJ/6850/data/10.out
 create mode 100644 LibreOJ/6850/data/2.in
 create mode 100644 LibreOJ/6850/data/2.out
 create mode 100644 LibreOJ/6850/data/3.in
 create mode 100644 LibreOJ/6850/data/3.out
 create mode 100644 LibreOJ/6850/data/4.in
 create mode 100644 LibreOJ/6850/data/4.out
 create mode 100644 LibreOJ/6850/data/5.in
 create mode 100644 LibreOJ/6850/data/5.out
 create mode 100644 LibreOJ/6850/data/6.in
 create mode 100644 LibreOJ/6850/data/6.out
 create mode 100644 LibreOJ/6850/data/7.in
 create mode 100644 LibreOJ/6850/data/7.out
 create mode 100644 LibreOJ/6850/data/8.in
 create mode 100644 LibreOJ/6850/data/8.out
 create mode 100644 LibreOJ/6850/data/9.in
 create mode 100644 LibreOJ/6850/data/9.out

diff --git a/LibreOJ/6850/6850.cpp b/LibreOJ/6850/6850.cpp
new file mode 100644
index 00000000..eb7f7bc5
--- /dev/null
+++ b/LibreOJ/6850/6850.cpp
@@ -0,0 +1,87 @@
+#include <iostream>
+
+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;
+}
diff --git a/LibreOJ/6850/data/1.in b/LibreOJ/6850/data/1.in
new file mode 100644
index 00000000..04103106
--- /dev/null
+++ b/LibreOJ/6850/data/1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cfbd01e193a52526c41879aa65246013d9598206e9d3ca7a8fdd9e239bb86936
+size 3626671
diff --git a/LibreOJ/6850/data/1.out b/LibreOJ/6850/data/1.out
new file mode 100644
index 00000000..4262b20a
--- /dev/null
+++ b/LibreOJ/6850/data/1.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:588a08d3a29d3c7e5d4d9edcab88c1852774c20c57175ab335dfad1e7b345475
+size 676115
diff --git a/LibreOJ/6850/data/10.in b/LibreOJ/6850/data/10.in
new file mode 100644
index 00000000..f610fdd7
--- /dev/null
+++ b/LibreOJ/6850/data/10.in
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/6850/data/10.out b/LibreOJ/6850/data/10.out
new file mode 100644
index 00000000..c9f8e6a1
--- /dev/null
+++ b/LibreOJ/6850/data/10.out
@@ -0,0 +1,3 @@
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+size 269995
diff --git a/LibreOJ/6850/data/2.in b/LibreOJ/6850/data/2.in
new file mode 100644
index 00000000..a64a5153
--- /dev/null
+++ b/LibreOJ/6850/data/2.in
@@ -0,0 +1,3 @@
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+size 94
diff --git a/LibreOJ/6850/data/2.out b/LibreOJ/6850/data/2.out
new file mode 100644
index 00000000..89064363
--- /dev/null
+++ b/LibreOJ/6850/data/2.out
@@ -0,0 +1,3 @@
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+size 31
diff --git a/LibreOJ/6850/data/3.in b/LibreOJ/6850/data/3.in
new file mode 100644
index 00000000..9ee5c68c
--- /dev/null
+++ b/LibreOJ/6850/data/3.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+size 7345043
diff --git a/LibreOJ/6850/data/3.out b/LibreOJ/6850/data/3.out
new file mode 100644
index 00000000..757fbb82
--- /dev/null
+++ b/LibreOJ/6850/data/3.out
@@ -0,0 +1,3 @@
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+size 1353327
diff --git a/LibreOJ/6850/data/4.in b/LibreOJ/6850/data/4.in
new file mode 100644
index 00000000..7aa9aa11
--- /dev/null
+++ b/LibreOJ/6850/data/4.in
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/6850/data/4.out b/LibreOJ/6850/data/4.out
new file mode 100644
index 00000000..d67e06d2
--- /dev/null
+++ b/LibreOJ/6850/data/4.out
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/6850/data/5.in b/LibreOJ/6850/data/5.in
new file mode 100644
index 00000000..359ae313
--- /dev/null
+++ b/LibreOJ/6850/data/5.in
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diff --git a/LibreOJ/6850/data/5.out b/LibreOJ/6850/data/5.out
new file mode 100644
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--- /dev/null
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diff --git a/LibreOJ/6850/data/6.in b/LibreOJ/6850/data/6.in
new file mode 100644
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--- /dev/null
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new file mode 100644
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diff --git a/LibreOJ/6850/data/7.in b/LibreOJ/6850/data/7.in
new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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