Buggy python submission (verdict: Runtime Error):
import math
n= int(input())


counter = 0
for i in range(1,13):
    if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
        counter = i
        break
kekka = n - int(26*(pow(26,counter-1))/(26-1)) + 1
syo = int(kekka/26)
amari = kekka%26

alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

lists = []
i = counter-1
while i>= 0 :
    sho = int(kekka / pow(26,i))
    kekka = kekka - pow(26,i)*sho
    i -=1
    if i >= 0:
        lists.append(alplist[sho])
    else:
        lists.append(alplist[sho-1])


print("".join(lists))


Fixed submission:

def C():
    import math
    n= int(input())

    counter = 0
    for i in range(1,13):
        if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
            counter = i
            break
    kekka = n - int(26*(pow(26,counter-1))/(26-1))

    alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

    kekkalist = []
    i = counter-1
    while i>= 0 :
        sho = int(kekka / pow(26,i))
        kekka = kekka - pow(26,i)*sho

        i -=1
        if i >= 0:
            kekkalist.append(alplist[sho])
        else:
            kekkalist.append(alplist[sho])


    print("".join(kekkalist))


C()

Buggy python submission (verdict: Runtime Error):
import math
n= int(input())


counter = 0
for i in range(1,13):
    if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
        counter = i
        break
kekka = n - int(26*(pow(26,counter-1))/(26-1)) + 1
syo = int(kekka/26)
amari = kekka%26

alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

lists = []
i = counter-1
while i>= 0 :
    sho = int(kekka / pow(26,i))
    kekka = kekka - pow(26,i)*sho
    i -=1
    if i >= 0:
        lists.append(alplist[sho])
    else:
        lists.append(alplist[sho-1])


print("".join(lists))


Fixed submission:

def C():
    import math
    n= int(input())

    counter = 0
    for i in range(1,13):
        if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
            counter = i
            break
    kekka = n - int(26*(pow(26,counter-1))/(26-1))

    alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

    kekkalist = []
    i = counter-1
    while i>= 0 :
        sho = int(kekka / pow(26,i))
        kekka = kekka - pow(26,i)*sho

        i -=1
        if i >= 0:
            kekkalist.append(alplist[sho])
        else:
            kekkalist.append(alplist[sho])


    print("".join(kekkalist))


C()

Buggy python submission (verdict: Runtime Error):
import math
def C():
    import math
    n= int(input())


    counter = 0
    for i in range(1,13):
        if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
            counter = i
            break
    kekka = n - int(26*(pow(26,counter-1))/(26-1)) + 1
    syo = int(kekka/26)
    amari = kekka%26

    alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

    lists = []
    i = counter-1
    while i>= 0 :
        sho = int(kekka / pow(26,i))
        kekka = kekka - pow(26,i)*sho
        i -=1
        if i >= 0:
            lists.append(alplist[sho])
        else:
            lists.append(alplist[sho-1])


    print("".join(lists))


C()


Fixed submission:

def C():
    import math
    n= int(input())

    counter = 0
    for i in range(1,13):
        if int(26*(pow(26,i-1))/(26-1)) <= n < int(26*(pow(26,i))/(26-1)):
            counter = i
            break
    kekka = n - int(26*(pow(26,counter-1))/(26-1))

    alplist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

    kekkalist = []
    i = counter-1
    while i>= 0 :
        sho = int(kekka / pow(26,i))
        kekka = kekka - pow(26,i)*sho

        i -=1
        if i >= 0:
            kekkalist.append(alplist[sho])
        else:
            kekkalist.append(alplist[sho])


    print("".join(kekkalist))


C()