diff --git a/code_study/Baekjoon/python/1316.py b/code_study/Baekjoon/python/1316.py
new file mode 100644
index 0000000..dcee08a
--- /dev/null
+++ b/code_study/Baekjoon/python/1316.py
@@ -0,0 +1,21 @@
+n = int(input())
+cnt = 0
+
+for _ in range(n):
+    chk = set()
+    s = input()
+    prev = None
+    flag = True
+
+    for ch in s:
+        if ch != prev :
+            if ch in chk:
+                flag = False
+                break
+            if prev is not None:
+                chk.add(prev)
+            prev = ch
+    
+    if flag : cnt+=1
+
+print(cnt)
diff --git a/code_study/Baekjoon/python/25206.py b/code_study/Baekjoon/python/25206.py
new file mode 100644
index 0000000..db7b1bc
--- /dev/null
+++ b/code_study/Baekjoon/python/25206.py
@@ -0,0 +1,11 @@
+grade ={
+    "A+" : 4.5, "A0" : 4.0,
+    "B+" : 3.5, "B0" : 3.0,
+    "C+" : 2.5, "C0" : 2.0,
+    "D+" : 1.5, "D0" : 1.0,
+    "F" : 0.0
+}
+line = [input().split() for _ in range(20)]
+credit = sum(float(line[i][1]) for i in range(20) if line[i][2] != 'P')
+rate = sum(float(line[i][1])*grade[line[i][2]] for i in range(20) if line[i][2] != 'P')
+print(round(rate/credit,6))
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/2941.py b/code_study/Baekjoon/python/2941.py
new file mode 100644
index 0000000..6c4feeb
--- /dev/null
+++ b/code_study/Baekjoon/python/2941.py
@@ -0,0 +1,5 @@
+alphabet = ["c=","c-","dz=","d-","lj","nj","s=","z="]
+s = input()
+for c in alphabet:
+    s = s.replace(c,'!')
+print(len(s))