this string converts the string to a list:
print(''.join(str(e) for e in t))
output
Output:
12345
if I would write here so we will see:
print(t)
Output:
[1, 2, 3, 4, 5]
the cycle works in reverse order from the end to the beginning. 5 4 3 2 1
for i in range(S-1,0,-1):
t[i] equal to last element 5, а t[i-1] equal 4 and we will move the second-to-last element to last. this command is executed in a loop 5 time, moving each previous item to the next
t[i]=t[i-1]
this command unifies the first element. on the second round of the cycle resets the second element and so 5 time
t[i1]=0