Buggy python submission (verdict: Runtime Error):
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
lis.sort()
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)

Fixed submission:
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
ad=3
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)

Buggy python submission (verdict: Runtime Error):
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
lis.sort()
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)

Fixed submission:
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
ad=3
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)

Buggy python submission (verdict: Runtime Error):
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)

Fixed submission:
# coding: utf-8
# hello worldと表示する
#dpでできないかな？
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import Counter, deque
from collections import defaultdict
from itertools import combinations, permutations, accumulate, groupby, product
from bisect import bisect_left,bisect_right
from heapq import heapify, heappop, heappush
from math import floor, ceil,pi
from operator import itemgetter
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))
def LI2(): return [int(input()) for i in range(n)]
def MXI(): return [[LI()]for i in range(n)]
def SI(): return input().rstrip()
def printns(x): print('\n'.join(x))
def printni(x): print('\n'.join(list(map(str,x))))
inf = 10**17
mod = 10**9 + 7

lis=sorted(LI())
count=0
while lis[0]+2<lis[2]:
    lis[0]+=2
    count+=1
while lis[1]+2<lis[2]:
    lis[1]+=2
    count+=1
#print(count)
#print(lis)
u=lis[0]
for i in range(3):
    lis[i]-=u
#print(lis)
ad=3
if lis==[0,0,0]:
    ad=0
elif lis==[0,0,1]:
    ad=1
elif lis==[0,1,1]:
    ad=2
elif lis==[0,1,2]:
    ad=3
elif lis==[0,0,2]:
    ad=2
elif lis==[0,2,2]:
    ad=1
print(count+ad)