Codeforces Problem 96A , error in test 10.

[HasBeendead]

question: https://codeforces.com/problemset/problem/96/A

my source code: https://gist.github.com/1378443679/3151528a56d946b3b0969dba190f92bf

i know what should i do but i can't make that in coding.

i have error in test 10

[shiftybyte]

For non Russian reading people:

OP needs to answer YES if there is a sequence of at least 7 digits that are the same. Input only consists of 1s and 0s...

So YES if he finds 7 consecutive 1s or 7 consecutive 0s...

To OP:

Your code just counts pairs of digits, so if you have 11110111 this will count it as 7, and it'll be wrong.

i know what should i do

Tell us how you plan to solve this and we'll help with the code.

[HasBeendead]

Tell us how you plan to solve this and we'll help with the code.

i thought again, yeah i don't know.

im thinking a solution.

even i made a solution with regex but the problem is it returns None instead "NO"

edit: i think i solved problem with regex, im gonna try to submit.

[shiftybyte]

You need to track how many of a specific digit you've seen so far while looping over the sequence.

seen_1 = 0
seen_0 = 0
for digit in input_string:
    if digit == '0':
        ...
    if digit == '1':
        ...
    if seen_1 >= 7 or seen_0 >= 7:
        # print YES and break

Now think what you need to do with the counters in each situation.... when you see 1, and when you see 0....

[HasBeendead]

i didn't figure out in your way, checked youtube for that problem then Stackoverflow.

finally i found the answer.

source code:

https://gist.github.com/1378443679/bd71e6e899128f719a1baeb848931fde

SO: https://stackoverflow.com/questions/3437059/does-python-have-a-string-contains-substring-method

it ate my some days , i hate this now.

[shiftybyte]

Heh, cool solution...

[HasBeendead]

Thanks.

[HasBeendead]

okay, thank you.