From e0c587e7bff295dc26524e8adf0c656965d7c063 Mon Sep 17 00:00:00 2001
From: Luthics <luthics@foxmail.com>
Date: Sun, 6 Nov 2022 14:04:19 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E7=AC=AC=E4=B8=89=E6=AC=A1?=
 =?UTF-8?q?=E5=AE=9E=E9=AA=8C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/3/1.py |  5 +++++
 test/3/2.py | 11 +++++++++++
 test/3/3.py |  5 +++++
 test/3/4.py | 10 ++++++++++
 4 files changed, 31 insertions(+)
 create mode 100644 test/3/1.py
 create mode 100644 test/3/2.py
 create mode 100644 test/3/3.py
 create mode 100644 test/3/4.py

diff --git a/test/3/1.py b/test/3/1.py
new file mode 100644
index 0000000..ce457bc
--- /dev/null
+++ b/test/3/1.py
@@ -0,0 +1,5 @@
+n = int(input())
+s = 1
+for i in range(n):
+    s *= (i + 1)
+print(s)
diff --git a/test/3/2.py b/test/3/2.py
new file mode 100644
index 0000000..d6ed205
--- /dev/null
+++ b/test/3/2.py
@@ -0,0 +1,11 @@
+n = input()
+a = int(n.split('-')[1])  # 暴力取出小数位数和精度
+i = 1
+s = 0
+while (1 / (2 * i - 1) >= 10**(-a)):  # 精度要求作为条件
+    if (i % 2 == 0):
+        s -= 1 / (2 * i - 1)
+    else:
+        s += 1 / (2 * i - 1)
+    i += 1
+print(("{:." + str(a) + "f}").format(s * 4))
diff --git a/test/3/3.py b/test/3/3.py
new file mode 100644
index 0000000..6127354
--- /dev/null
+++ b/test/3/3.py
@@ -0,0 +1,5 @@
+n = int(input())
+a = [0, 1]
+for i in range(2, n + 1):
+    a.append(a[i - 1] + a[i - 2])  # 递推
+print(a[n])
\ No newline at end of file
diff --git a/test/3/4.py b/test/3/4.py
new file mode 100644
index 0000000..2efd92f
--- /dev/null
+++ b/test/3/4.py
@@ -0,0 +1,10 @@
+n = int(input())
+a = list(map(int, input().split()))
+for i in range(n):
+    for j in range(i + 1, n):
+        if (a[j] < a[i]):
+            ls = a[i]
+            a[i] = a[j]
+            a[j] = ls
+for i in range(n):
+    print(a[i], end=" ")