Python编译错误，但提交上去UKE

import math
import random
def paida(x, y):
    return (x > y)
n,k=input().split()
for __count in range(n):
    a=input()
    pass
k=int(k)
n=int(n)
a=int(a)
k=k-1
ans=int(ans)
ans=a[n]-a[1]+1
for __count in range(n):
    i=int(i)
    i=1
    a[i]=a[i+1]-a[i]-1
    i=i+1
    pass
sorted(a+1,a+n,paida)
for __count in range(k):
    i=int(i)
    i=1
    ans=ans-a[i]
    pass
print(ans)