diff --git "a/HomeWork/2.\354\210\230\355\225\231/10818.py" "b/HomeWork/2.\354\210\230\355\225\231/10818.py"
new file mode 100644
index 0000000..e105579
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/10818.py"
@@ -0,0 +1,4 @@
+N = int(input())
+L = list(map(int, input().split()))
+print(min(L), end=" ")
+print(max(L))
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/10870.py" "b/HomeWork/2.\354\210\230\355\225\231/10870.py"
new file mode 100644
index 0000000..333d103
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/10870.py"
@@ -0,0 +1,8 @@
+L = [0, 1]
+
+n = int(input())
+
+for i in range(2, n+1):
+    L.append(L[i-2] + L[i-1])
+
+print(L[n])
diff --git "a/HomeWork/2.\354\210\230\355\225\231/1292.py" "b/HomeWork/2.\354\210\230\355\225\231/1292.py"
new file mode 100644
index 0000000..64445a1
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/1292.py"
@@ -0,0 +1,7 @@
+L = []
+a, b = map(int, input().split())
+for i in range(1000):
+  for j in range(i): 
+    L.append(i)
+    
+print(sum(L[a-1:b]))
diff --git "a/HomeWork/2.\354\210\230\355\225\231/1978.py" "b/HomeWork/2.\354\210\230\355\225\231/1978.py"
new file mode 100644
index 0000000..cdad9f1
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/1978.py"
@@ -0,0 +1,18 @@
+N= int(input())
+L= list(map(int, input().split()))
+
+c = 0
+
+for n in L:
+    if n == 1:
+        continue
+    if n == 2 or n == 3:
+        c += 1
+    else:
+        for i in range(2, int(n/2)+1):
+            if n % i == 0:
+                break
+            if i == int(n/2):
+                c += 1
+        
+print(c)
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2309.py" "b/HomeWork/2.\354\210\230\355\225\231/2309.py"
new file mode 100644
index 0000000..c126106
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2309.py"
@@ -0,0 +1,21 @@
+L = []
+for i in range(9):
+    L.append(int(input()))
+A = sum(L)-100
+
+def DeleteFakeDwarf(L):
+    for i in range(8):
+        for j in range(1,9):
+            if j <= i:
+                continue
+            if L[i]+L[j] == A:
+                one, two = L[i], L[j]
+                L.remove(one)
+                L.remove(two)
+                return 
+
+DeleteFakeDwarf(L)
+L.sort()
+    
+for i in L:
+    print(i)
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2460.py" "b/HomeWork/2.\354\210\230\355\225\231/2460.py"
new file mode 100644
index 0000000..5c790b6
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2460.py"
@@ -0,0 +1,9 @@
+current_passenger = 0
+max_passenger = 0
+
+for _ in range(10):
+    o, i = map(int, input().split())
+    current_passenger += (i - o)
+    if current_passenger > max_passenger:
+        max_passenger = current_passenger
+print(max_passenger)
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2501.py" "b/HomeWork/2.\354\210\230\355\225\231/2501.py"
new file mode 100644
index 0000000..2884eda
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2501.py"
@@ -0,0 +1,12 @@
+N, K = map(int, input().split())
+
+divisorList = []
+
+for i in range(1, N+1):
+    if N % i == 0:
+        divisorList.append(i)
+    if len(divisorList) == K:
+        print(i)
+        break
+if len(divisorList) < K:
+    print(0)
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2581.py" "b/HomeWork/2.\354\210\230\355\225\231/2581.py"
new file mode 100644
index 0000000..c2820fb
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2581.py"
@@ -0,0 +1,22 @@
+M= int(input())
+N= int(input())
+
+L = []
+
+for n in range(M, N+1):
+    if n == 1:
+        continue
+    if n == 2 or n == 3:
+        L.append(n)
+    else:
+        for i in range(2, int(n/2)+1):
+            if n % i == 0:
+                break
+            if i == int(n/2):
+                L.append(n)
+
+if len(L) == 0:
+    print(-1)
+else:
+    print(sum(L))
+    print(min(L))
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2609.py" "b/HomeWork/2.\354\210\230\355\225\231/2609.py"
new file mode 100644
index 0000000..9c8b87d
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2609.py"
@@ -0,0 +1,17 @@
+# 최대공약수와 최소공배수
+# 유클리드호제법을 활용한 최대공약수 최소공배수
+
+# 최대공약수
+def gcd(a, b):
+    while b>0:
+        a, b = b, a % b
+    return a
+
+# 최소공배수
+def lcm(a,b):
+    return a*b / gcd(a,b)
+
+a, b = map(int, input().split())
+
+print(gcd(a,b))
+print(int(lcm(a,b)))
diff --git "a/HomeWork/2.\354\210\230\355\225\231/2693.py" "b/HomeWork/2.\354\210\230\355\225\231/2693.py"
new file mode 100644
index 0000000..6b2bdbe
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/2693.py"
@@ -0,0 +1,7 @@
+#N번째 큰 수
+T = int(input())
+
+for _ in range(T):
+    L = list(map(int, input().split()))
+    L.sort(reverse=True)
+    print(L[2])
\ No newline at end of file
diff --git "a/HomeWork/2.\354\210\230\355\225\231/3460(\355\213\200\353\246\274).py" "b/HomeWork/2.\354\210\230\355\225\231/3460(\355\213\200\353\246\274).py"
new file mode 100644
index 0000000..bef9536
--- /dev/null
+++ "b/HomeWork/2.\354\210\230\355\225\231/3460(\355\213\200\353\246\274).py"
@@ -0,0 +1,11 @@
+#이진수
+
+T = int(input())
+n = int(input())
+
+num = str(format(n,'b'))
+reversed_num = "".join(reversed(num))
+print(num)
+for i in range(len(reversed_num)):
+    if reversed_num[i] == "1":
+        print(i, end=" ")
\ No newline at end of file