diff --git "a/BOJ/\354\225\214\352\263\240\353\246\254\354\246\230/11399.py" "b/BOJ/\354\225\214\352\263\240\353\246\254\354\246\230/11399.py"
new file mode 100644
index 0000000..b15b527
--- /dev/null
+++ "b/BOJ/\354\225\214\352\263\240\353\246\254\354\246\230/11399.py"
@@ -0,0 +1,9 @@
+n = int(input())
+p = list(map(int, input().split()))
+p.sort()
+result = 0
+data = []
+for i in range(n):
+    result += p[i]
+    data.append(result)
+print(sum(data))
\ No newline at end of file
diff --git "a/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-1.py" "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-1.py"
new file mode 100644
index 0000000..15b3fcc
--- /dev/null
+++ "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-1.py"
@@ -0,0 +1,10 @@
+# 거스름돈
+n = int(input())
+count = 0
+coinArray = [500, 100, 50, 10]
+
+for coin in coinArray:
+    count += n//coin # 거스름돈을 coin으로 나누고 나온 몫
+    n %= coin # n을 coin으로 나눈 나머지를 n에 대입
+
+print(count)
\ No newline at end of file
diff --git "a/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-2.py" "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-2.py"
new file mode 100644
index 0000000..44fffe1
--- /dev/null
+++ "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-2.py"
@@ -0,0 +1,16 @@
+# 큰 수의 법
+
+n, m, k = map(int, input().split())
+result = 0
+data = list(map(int, input().split()))
+
+data.sort()
+
+while m > 0:
+    for i in range(k):
+        result += data[-1]
+        m -= 1
+    result += data[-2]
+    m -= 1
+
+print(result)
diff --git "a/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-3.py" "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-3.py"
new file mode 100644
index 0000000..b2c571d
--- /dev/null
+++ "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-3.py"
@@ -0,0 +1,14 @@
+# 숫자 카드 게임
+
+# n : 행의 개수
+# m : 열의 개수
+
+n, m = map(int, input().split())
+minData = []
+for i in range(n):
+    data = list(map(int, input().split()))
+    data.sort()
+    data[0]
+    minData.append(data[0])
+minData.sort()
+print(minData[-1])
\ No newline at end of file
diff --git "a/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-4.py" "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-4.py"
new file mode 100644
index 0000000..e9803b0
--- /dev/null
+++ "b/CodingTest/3.\352\267\270\353\246\254\353\224\224/3-4.py"
@@ -0,0 +1,14 @@
+# 1이 될 때까지
+
+n, k = map(int, input().split())
+count = 0
+
+while n >= 1:
+    if n%k == 0:
+        n //= k
+        count += n//k
+    else:
+        n -= 1
+        count += 1
+
+print(count)
\ No newline at end of file