From c1cc18c1596cd5a444d9f1ee9b761764501b24f1 Mon Sep 17 00:00:00 2001
From: Baoshuo Ren <i@baoshuo.ren>
Date: Wed, 1 Dec 2021 20:54:34 +0800
Subject: [PATCH] =?UTF-8?q?#2423.=20=E3=80=8CNOIP2015=E3=80=8D=E8=B7=B3?=
 =?UTF-8?q?=E7=9F=B3=E5=A4=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

https://loj.ac/s/1314081
---
 LibreOJ/2423/2423.cpp         | 37 +++++++++++++++++++++++++++++++++++
 LibreOJ/2423/data/stone1.ans  |  3 +++
 LibreOJ/2423/data/stone1.in   |  3 +++
 LibreOJ/2423/data/stone10.ans |  3 +++
 LibreOJ/2423/data/stone10.in  |  3 +++
 LibreOJ/2423/data/stone2.ans  |  3 +++
 LibreOJ/2423/data/stone2.in   |  3 +++
 LibreOJ/2423/data/stone3.ans  |  3 +++
 LibreOJ/2423/data/stone3.in   |  3 +++
 LibreOJ/2423/data/stone4.ans  |  3 +++
 LibreOJ/2423/data/stone4.in   |  3 +++
 LibreOJ/2423/data/stone5.ans  |  3 +++
 LibreOJ/2423/data/stone5.in   |  3 +++
 LibreOJ/2423/data/stone6.ans  |  3 +++
 LibreOJ/2423/data/stone6.in   |  3 +++
 LibreOJ/2423/data/stone7.ans  |  3 +++
 LibreOJ/2423/data/stone7.in   |  3 +++
 LibreOJ/2423/data/stone8.ans  |  3 +++
 LibreOJ/2423/data/stone8.in   |  3 +++
 LibreOJ/2423/data/stone9.ans  |  3 +++
 LibreOJ/2423/data/stone9.in   |  3 +++
 21 files changed, 97 insertions(+)
 create mode 100644 LibreOJ/2423/2423.cpp
 create mode 100644 LibreOJ/2423/data/stone1.ans
 create mode 100644 LibreOJ/2423/data/stone1.in
 create mode 100644 LibreOJ/2423/data/stone10.ans
 create mode 100644 LibreOJ/2423/data/stone10.in
 create mode 100644 LibreOJ/2423/data/stone2.ans
 create mode 100644 LibreOJ/2423/data/stone2.in
 create mode 100644 LibreOJ/2423/data/stone3.ans
 create mode 100644 LibreOJ/2423/data/stone3.in
 create mode 100644 LibreOJ/2423/data/stone4.ans
 create mode 100644 LibreOJ/2423/data/stone4.in
 create mode 100644 LibreOJ/2423/data/stone5.ans
 create mode 100644 LibreOJ/2423/data/stone5.in
 create mode 100644 LibreOJ/2423/data/stone6.ans
 create mode 100644 LibreOJ/2423/data/stone6.in
 create mode 100644 LibreOJ/2423/data/stone7.ans
 create mode 100644 LibreOJ/2423/data/stone7.in
 create mode 100644 LibreOJ/2423/data/stone8.ans
 create mode 100644 LibreOJ/2423/data/stone8.in
 create mode 100644 LibreOJ/2423/data/stone9.ans
 create mode 100644 LibreOJ/2423/data/stone9.in

diff --git a/LibreOJ/2423/2423.cpp b/LibreOJ/2423/2423.cpp
new file mode 100644
index 00000000..36b4e792
--- /dev/null
+++ b/LibreOJ/2423/2423.cpp
@@ -0,0 +1,37 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, m, l, r, mid, ans, a[50005];
+
+bool check(int x) {
+    int now = 0, cnt = 0;
+    for (int i = 1; i <= n; i++) {
+        if (a[i] - a[now] < x) {
+            cnt++;
+        } else {
+            now = i;
+        }
+    }
+    return cnt <= m;
+}
+
+int main() {
+    cin >> r >> n >> m;
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+    }
+    a[n + 1] = r;
+    l = 1;
+    while (l <= r) {
+        mid = l + r >> 1;
+        if (check(mid)) {
+            ans = mid;
+            l = mid + 1;
+        } else {
+            r = mid - 1;
+        }
+    }
+    cout << ans << endl;
+    return 0;
+}
diff --git a/LibreOJ/2423/data/stone1.ans b/LibreOJ/2423/data/stone1.ans
new file mode 100644
index 00000000..d595cdb8
--- /dev/null
+++ b/LibreOJ/2423/data/stone1.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7de1555df0c2700329e815b93b32c571c3ea54dc967b89e81ab73b9972b72d1d
+size 2
diff --git a/LibreOJ/2423/data/stone1.in b/LibreOJ/2423/data/stone1.in
new file mode 100644
index 00000000..386d8ed3
--- /dev/null
+++ b/LibreOJ/2423/data/stone1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:713fa6511593c7cd8301cd3f27ed72544018b35aee6c90cdb9552fc51827ddfb
+size 21
diff --git a/LibreOJ/2423/data/stone10.ans b/LibreOJ/2423/data/stone10.ans
new file mode 100644
index 00000000..23d4ecea
--- /dev/null
+++ b/LibreOJ/2423/data/stone10.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b4e661cf520f58059bffad5ca1f4dc13c9c4884ccc0e2130b9c26bf07930465d
+size 5
diff --git a/LibreOJ/2423/data/stone10.in b/LibreOJ/2423/data/stone10.in
new file mode 100644
index 00000000..2a63f18c
--- /dev/null
+++ b/LibreOJ/2423/data/stone10.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c11bed1a8a490220a3b56ff6f05c7a9956d1f82e2a77638e19aac48829963609
+size 489017
diff --git a/LibreOJ/2423/data/stone2.ans b/LibreOJ/2423/data/stone2.ans
new file mode 100644
index 00000000..30c8ef68
--- /dev/null
+++ b/LibreOJ/2423/data/stone2.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9b74757a5504b7a09e9ad97ec341ee7ed765600267341c67c45b7fbeb402e6eb
+size 9
diff --git a/LibreOJ/2423/data/stone2.in b/LibreOJ/2423/data/stone2.in
new file mode 100644
index 00000000..b945c835
--- /dev/null
+++ b/LibreOJ/2423/data/stone2.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fc5ea2b4fa734ada2bbada42cd7085e6f1b4534a563fb42f4028d14e22da2c1a
+size 13
diff --git a/LibreOJ/2423/data/stone3.ans b/LibreOJ/2423/data/stone3.ans
new file mode 100644
index 00000000..7032e492
--- /dev/null
+++ b/LibreOJ/2423/data/stone3.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c5041f825d84a07b72417b7e45139a068ee38dcdaeecfc57ac25ea76045fe0f4
+size 7
diff --git a/LibreOJ/2423/data/stone3.in b/LibreOJ/2423/data/stone3.in
new file mode 100644
index 00000000..588ab38c
--- /dev/null
+++ b/LibreOJ/2423/data/stone3.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1f97f4bea73b7b7588960550d639426d6a17cc288205bdbcfeaf1a579ef7fba3
+size 870
diff --git a/LibreOJ/2423/data/stone4.ans b/LibreOJ/2423/data/stone4.ans
new file mode 100644
index 00000000..4c6f8e25
--- /dev/null
+++ b/LibreOJ/2423/data/stone4.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3cd487f345e9c43517366103da017f7a1b4f05a93c00497731d0c053c48552d0
+size 7
diff --git a/LibreOJ/2423/data/stone4.in b/LibreOJ/2423/data/stone4.in
new file mode 100644
index 00000000..2a483432
--- /dev/null
+++ b/LibreOJ/2423/data/stone4.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0bd9f58520e74df53fcd2f948e72c87895d9ad0c633b5f2049b3c1b6e98d39d9
+size 892
diff --git a/LibreOJ/2423/data/stone5.ans b/LibreOJ/2423/data/stone5.ans
new file mode 100644
index 00000000..de0dd2f4
--- /dev/null
+++ b/LibreOJ/2423/data/stone5.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:84be431e30a10b7a1e418721898ea78d8e3d617974659946e0fe1204a58e1897
+size 8
diff --git a/LibreOJ/2423/data/stone5.in b/LibreOJ/2423/data/stone5.in
new file mode 100644
index 00000000..bb03056d
--- /dev/null
+++ b/LibreOJ/2423/data/stone5.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b48d64fb44b5ae101c3afd4d3b9072e7e3cf2094f24b9b3479c05db5d143cd75
+size 893
diff --git a/LibreOJ/2423/data/stone6.ans b/LibreOJ/2423/data/stone6.ans
new file mode 100644
index 00000000..6df868cd
--- /dev/null
+++ b/LibreOJ/2423/data/stone6.ans
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+size 5
diff --git a/LibreOJ/2423/data/stone6.in b/LibreOJ/2423/data/stone6.in
new file mode 100644
index 00000000..075ade4a
--- /dev/null
+++ b/LibreOJ/2423/data/stone6.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:24622862f627b8371f0495b13fc7378fb2fd93cd2baf4d8e7dc9c2df60d3c237
+size 43593
diff --git a/LibreOJ/2423/data/stone7.ans b/LibreOJ/2423/data/stone7.ans
new file mode 100644
index 00000000..3eb31b07
--- /dev/null
+++ b/LibreOJ/2423/data/stone7.ans
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/2423/data/stone7.in b/LibreOJ/2423/data/stone7.in
new file mode 100644
index 00000000..298856f5
--- /dev/null
+++ b/LibreOJ/2423/data/stone7.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/LibreOJ/2423/data/stone8.ans b/LibreOJ/2423/data/stone8.ans
new file mode 100644
index 00000000..d790bd49
--- /dev/null
+++ b/LibreOJ/2423/data/stone8.ans
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/2423/data/stone8.in b/LibreOJ/2423/data/stone8.in
new file mode 100644
index 00000000..d98b1fcb
--- /dev/null
+++ b/LibreOJ/2423/data/stone8.in
@@ -0,0 +1,3 @@
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diff --git a/LibreOJ/2423/data/stone9.ans b/LibreOJ/2423/data/stone9.ans
new file mode 100644
index 00000000..75d6c5fb
--- /dev/null
+++ b/LibreOJ/2423/data/stone9.ans
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diff --git a/LibreOJ/2423/data/stone9.in b/LibreOJ/2423/data/stone9.in
new file mode 100644
index 00000000..285a6de5
--- /dev/null
+++ b/LibreOJ/2423/data/stone9.in
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