Merge pull request youngyangyang04#2668 from Yang-Changhui/master

add problems/kamacoder/0110.字符串接龙.md python

Author: youngyangyang04

problems/kamacoder/0110.字符串接龙.md

@@ -217,6 +217,38 @@ public class Main {
 ```
 
 ### Python
+```Python
+def judge(s1,s2):
+    count=0
+    for i in range(len(s1)):
+        if s1[i]!=s2[i]:
+            count+=1
+    return count==1
+
+if __name__=='__main__':
+    n=int(input())
+    beginstr,endstr=map(str,input().split())
+    if beginstr==endstr:
+        print(0)
+        exit()
+    strlist=[]
+    for i in range(n):
+        strlist.append(input())
+    
+    # use bfs
+    visit=[False for i in range(n)]
+    queue=[[beginstr,1]]
+    while queue:
+        str,step=queue.pop(0)
+        if judge(str,endstr):
+            print(step+1)
+            exit()
+        for i in range(n):
+            if visit[i]==False and judge(strlist[i],str):
+                visit[i]=True
+                queue.append([strlist[i],step+1])
+    print(0)
+```
 
 ### Go