Buggy python submission (verdict: Runtime Error):
N = int(input())
d = list(map(int, input().split())) 
print(len(d))

if(len(d)%2!=0):
    print(0)
else: 
    print(d[int(len(d)/2)]-d[int(len(d)/2)-1])

Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c ana a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")


Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d):
        count+=1
else if(a==c):
    count+=1
    if(b==d):
        count+=1
else if(a==d):
    count+=1
    if(b==c):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")


Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d):
        count+=1
else if(a==c):
    count+=1
    if(b==d):
        count+=1
else if(a==d):
    count+=1
    if(b==c):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")


Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
a,b,c,d=input()
count=0

if(a==b or a==c or a==d):
    count+=1

if(b==c or b==d or c==d):
    if(b!=a and c!=a and d!=a):
    count+=1

if(count==2):
    print("Yes")
else:
    print("No")


Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
a,b,c,d=input()
count=0

if(a==b or a==c or a==d):
    count+=1

if(b==c or b==d or c==d):
    if(b!=a and c!=a and d!=a)
    count+=1

if(count==2):
    print("Yes")
else:
    print("No")


Fixed submission:
a,b,c,d=input()
count=0

if(a==b):
    count+=1
    if(c==d and a!=c):
        count+=1
elif(a==c):
    count+=1
    if(b==d and a!=b):
        count+=1
elif(a==d):
    count+=1
    if(b==c and a!=b):
        count+=1

if(count==2):
    print("Yes")
else:
    print("No")