diff --git a/백준/11722.py b/백준/11722.py
new file mode 100644
index 0000000..f2d2018
--- /dev/null
+++ b/백준/11722.py
@@ -0,0 +1,15 @@
+import sys
+
+input = sys.stdin.readline
+
+n = int(input())
+lst = list(map(int, input().split()))
+
+dp = [1 for _ in range(n)]
+
+for i in range(n-1, -1 ,-1):
+    for j in range(n-1, i-1, -1):
+        if lst[i] > lst[j]:
+            dp[i] = max(dp[i], dp[j]+1)
+
+print(max(dp))
\ No newline at end of file
diff --git a/백준/11724.py b/백준/11724.py
new file mode 100644
index 0000000..93af0c8
--- /dev/null
+++ b/백준/11724.py
@@ -0,0 +1,30 @@
+import sys
+sys.setrecursionlimit(10**6)
+
+input = sys.stdin.readline
+
+N, M = map(int, input().split())
+A = list([] for i in range(N+1))
+tot=0
+
+visited = [0] * (N+1)
+
+for _ in range(M):
+    s, e = map(int, input().split())
+    A[s].append(e)
+    A[e].append(s)
+
+
+def DFS(v):
+    visited[v] = True
+    for i in A[v]:
+        if(visited[i]==False):
+            DFS(i)
+
+
+for i in range(1,N+1):
+    if(visited[i]==False):
+        tot+=1
+        DFS(i)
+
+print(tot)
\ No newline at end of file
diff --git a/백준/12015.py b/백준/12015.py
new file mode 100644
index 0000000..ffb551c
--- /dev/null
+++ b/백준/12015.py
@@ -0,0 +1,18 @@
+from bisect import bisect_left
+import sys
+
+input = sys.stdin.readline
+
+n = int(input())
+lst = list(map(int, input().split()))
+stack = []
+
+for i in lst:
+    if not stack or stack[-1] < i:
+        stack.append(i)
+    else:
+        a = bisect_left(stack, i)
+        stack[a] = i
+
+print(len(stack))
+print(*stack)
\ No newline at end of file
diff --git a/백준/13251.py b/백준/13251.py
new file mode 100644
index 0000000..217d46c
--- /dev/null
+++ b/백준/13251.py
@@ -0,0 +1,16 @@
+from itertools import combinations
+import sys
+from math import factorial
+from math import comb
+
+input = sys.stdin.readline
+
+N = int(input())
+a = list(map(int, input().split()))
+k = int(input())
+total = sum(a)
+arrtot = 0
+for i in a:
+    arrtot += comb(i, k)
+
+print(arrtot / (comb(total, k)))
diff --git a/백준/14002.py b/백준/14002.py
new file mode 100644
index 0000000..dd567b1
--- /dev/null
+++ b/백준/14002.py
@@ -0,0 +1,38 @@
+import sys
+from bisect import bisect_left
+
+input = sys.stdin.readline
+
+n = int(input())
+lst = list(map(int, input().split()))
+
+stack = []
+stack_idx = []
+
+dp_table = [1 for i in range(n+1)]
+prev = [-1 for i in range(n+1)]
+
+for i in range(n):
+    if not stack or stack[-1]<lst[i]:
+        stack.append(lst[i])
+        if stack_idx:
+            prev[i] = stack_idx[-1]
+        stack_idx.append(i)
+    else:
+        k = bisect_left(stack, lst[i])
+        stack[k] = lst[i]
+        if k > 0:
+            prev[i] = stack_idx[k-1]
+        stack_idx[k] = i
+
+k = len(stack)
+idx = stack_idx[-1]
+result = []
+while idx!=-1:
+    result.append(lst[idx])
+    idx = prev[idx]
+
+result.reverse()
+
+print(k)
+print(*result)
\ No newline at end of file