diff --git "a/week03/hyewon/BOJ_\354\212\244\355\203\235_\354\210\230\354\227\264.py" "b/week03/hyewon/BOJ_\354\212\244\355\203\235_\354\210\230\354\227\264.py"
new file mode 100644
index 0000000..d9bdeca
--- /dev/null
+++ "b/week03/hyewon/BOJ_\354\212\244\355\203\235_\354\210\230\354\227\264.py"
@@ -0,0 +1,25 @@
+n = int(input())
+
+arr = [] # 입력 수열
+stack = [] # 진짜 스택
+output = [] # +, - 저장
+
+current = 1 
+
+for _ in range(n):
+    arr.append(int(input()))
+
+for x in arr:
+    while current <= x:
+        stack.append(current)
+        output.append('+')
+        current += 1
+    
+    if stack and stack[-1] == x:
+        stack.pop()
+        output.append('-')
+    else:
+        print("NO")
+        exit()
+        
+print('\n'.join(output))
\ No newline at end of file
diff --git "a/week03/hyewon/Programmers_\354\212\244\355\203\235\354\234\274\353\241\234_\355\201\220_\352\265\254\355\230\204.py" "b/week03/hyewon/Programmers_\354\212\244\355\203\235\354\234\274\353\241\234_\355\201\220_\352\265\254\355\230\204.py"
new file mode 100644
index 0000000..33cb488
--- /dev/null
+++ "b/week03/hyewon/Programmers_\354\212\244\355\203\235\354\234\274\353\241\234_\355\201\220_\352\265\254\355\230\204.py"
@@ -0,0 +1,30 @@
+def func_a(stack): # 최종 결과
+    return stack.pop()
+
+def func_b(stack1, stack2):
+    while not func_c(stack1): # = 차있을동안
+        item = func_a(stack1)
+        stack2.append(item)
+
+def func_c(stack): # 비어 있는 여부
+    return (len(stack) == 0)
+
+def solution(stack1, stack2):
+    if func_c(stack2): # 비어 있으면 
+        func_b(stack1, stack2)
+    
+    answer = func_a(stack2)
+    return answer
+
+# 테스트 케이스 출력
+stack1_1 = [1,2]
+stack2_1 = [3,4]
+ret1 = solution(stack1_1, stack2_1)
+
+print("solution 함수의 반환 값은", ret1, "입니다.")
+
+stack1_2 = [1,2,3]
+stack2_2 = []
+ret2 = solution(stack1_2, stack2_2)
+
+print("solution 함수의 반환 값은", ret2, "입니다.")
\ No newline at end of file
diff --git "a/week03/hyewon/Programmers_\355\203\200\352\262\237_\353\204\230\353\262\204.py" "b/week03/hyewon/Programmers_\355\203\200\352\262\237_\353\204\230\353\262\204.py"
new file mode 100644
index 0000000..0a1fbeb
--- /dev/null
+++ "b/week03/hyewon/Programmers_\355\203\200\352\262\237_\353\204\230\353\262\204.py"
@@ -0,0 +1,21 @@
+def solution(numbers, target):
+    answer = 0
+
+    def dfs(index, current_sum):
+        nonlocal answer
+
+        # 종료 조건
+        if index == len(numbers):
+            if current_sum == target:
+                answer += 1
+            return
+
+        # 현재 숫자를 + 하는 경우
+        dfs(index + 1, current_sum + numbers[index])
+
+        # 현재 숫자를 - 하는 경우
+        dfs(index + 1, current_sum - numbers[index])
+
+    dfs(0, 0)
+
+    return answer
\ No newline at end of file