auto save

e.py

+'''
+n=int(input())
+a=input()
+c=0
+d=1
+if n==len(a):
+    if n==1:
+        print(0)
+    if n>1:
+        for i in range(0,n-1):
+            if a[i]=="v":
+                if a[i+1]=="k":
+                    c=c+1
+                else:
+                    d=0
+        if d==0:
+            print(c+1)
+        else:
+            print(c)
+'''
+'''
+n=int(input())
+list_a=list(map(float,input().split()))
+z=max(list_a)
+x=min(list_a)
+list_a.remove(z)
+list_a.remove(x)
+num=0
+for i in list_a:
+    num=num+i
+c=num/(n-2)
+list_b=[]
+for j in list_a:
+    q=abs(j-c)
+    list_b.append(q)
+v=max(list_b)
+print("%.2f"%c,"%.2f"%v)
+
+
+a=int(input())
+a=str(a)
+b=[]
+for i in a:
+    b.append(i)
+
+if b[0] != "-"  and b[-1]!="0":
+    b.reverse()
+    m=""
+    for i in b:
+        m=m+i
+    print(m)
+
+elif  b[0] !="-"  and b[-1]=="0":
+    b.pop(-1)
+    b.reverse()
+    m=""
+    for i in b:
+        m=m+i
+    print(m)
+
+elif b[0]=="-" and b[-1] !="0":
+    b.reverse()
+    b.pop()
+    b.insert(0,"-")
+    m=""
+    for i in b:
+        m=m+i
+    print(m)
+
+elif b[0]=="-" and b[-1]=="0":
+    b.pop()
+    b.reverse()
+    b.pop()
+    b.insert(0,"-")
+    m=""
+    for i in b:
+        m=m+i
+    print(m)
+
+
+m=int(input())
+n=int(input())
+a=m
+b=n
+if a>b:
+    r=a%b
+    while r!=0:
+        a=b
+        b=r
+        r=a%b
+    print(b)
+elif a<=b:
+    a,b=b,a
+    r=a%b
+    while r!=0:
+        a=b
+        b=r
+        r=a%b
+    print(b)
+
+if n==b and m!=b:
+    print(m//n)
+elif n!=b and m==b:
+    print(m//b,"/",n//b)
+elif n!=b and m!=b:
+    print(m//b,"/",n//b)
+elif n==m:
+    print(1)
+'''
+
+'''
+n=int(input())
+he=1
+sum=0
+for i in range(1,n+1):
+    he=1    
+    for j in range(1,i+1):
+        he=he*j
+    sum=sum+he
+print(sum)
+'''
+
+
+'''
+def v():
+    s=(a+b)*c
+    print(s)
+a,b,c=map(int,input().split())             #全局变量
+v()  
+
+
+
+def v():
+    a,b,c=map(int,input().split())          #局部变量
+    s=(a+b)*c
+    print(s)
+v()
+'''
+'''
+from turtle import *
+import random 
+import time 
+
+n=100.0
+speed("fastest")
+screensize(bg='seashell')
+left(90)
+forward(3*n)
+color("orange","yellow")
+begin_fill()
+left(126)
+
+for i in range(5):
+    forward(n/5)
+    right(144)
+    forward(n/5)
+    left(72)
+end_fill()
+right(126)
+
+color("dark green")
+backward(n*4.8)
+def tree(d,s):
+    if d<=0:
+        return
+    forward(s)
+    tree(d-1,s*0.8)
+    right(120)
+    tree(d-3,s*0.5)
+    right(120)
+    tree(d-3,s*0.5)
+    right(120)
+    backward(s)
+tree(15,n)
+backword(n/2)
+
+for i in range(200):
+    a=200-400*random.random()
+    b=10-20*random.random()
+    up()
+    forward(b)
+    left(90)
+    forward(a)
+    down()
+    if random.random(0,1)==0:
+        color("tomato")
+    else:
+        color("wheat")
+    circle(2)
+    up()
+    backward(a)
+    right(90)
+    backward(b)
+time.sleep(60)
+'''
+
+
+for xun'huan
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