# ??? Question Marks? [closed]

Challenge

Create a function that takes an string as a parameter. (Easy as far)

This string will contain

• Single digit numbers
• Letters from the alphabet
• Question marks (Of course)

Your function will check if there are exactly 3 question marks between every pair of two numbers that add up to 10 or more. If so, then your function should return truthy, otherwise it should return falsey.

If there are not any two numbers that add up to 10 or more in the string, your function should return false.

Rules

• Input must be a string
• Output must be truthy or falsey value
• If string contains only one number or none return falsey
• If string contains odd amount of single digits, ignore the last one (left to right)

Example

Given: "arrb6???4xxbl5???eee5"

Your function must output true because there are exactly 3 question marks between 6 and 4, and 3 question marks between 5 and 5 at the end of the string

Given: "a4sd???9dst8?3r"

Your function must output false because there is just a single question mark between 8 and 3

Test Cases

Input: "aa6?9"

Output: false

Input: "acc?7??sss?3rr1??????5"

Output: true

Input: "sdty5???xcd8s3"

Output: true

Input: "sthfer5dfs"

Output: false

## Update (Some clarification points)

• Once you use a number to pair with other, you can not use it again.
• You only can pair consecutive numbers (left to right). Example "as4f???6sda3?3d" the pairs are 4-6 and 3-3

This is , so the shortest answer in bytes win.

## closed as unclear what you're asking by Jo King, AdmBorkBork, Xcali, Mr. Xcoder, TotoApr 26 '18 at 14:08

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Comments are not for extended discussion; this conversation has been moved to chat. – Mego Apr 27 '18 at 1:49
• The "Once you use a number to pair with other, you can not use it again." part is still not very clear. Perhaps you meant "only consider gaps at even indices", something like that. – user202729 Apr 27 '18 at 14:56
• Any reason why you special-cased the "1 number or none" case? – user202729 Apr 27 '18 at 14:59
• This question appears to be taken from here. – Laikoni Apr 27 '18 at 22:16
• Yes it is @Laikoni – Luis felipe De jesus Munoz Apr 27 '18 at 22:51

# Python 3, 148 bytes

def f(a):q=[a.group(1).count("?")==3for a in re.finditer("(?=((\d+)\D+(\d+)))",a)if 10==sum(map(int,a.groups()[1:]))];return any(q)*all(q)
import re


Try it online!

• Doesnt work with complex strings like arrb6???4xxbl5???eee5 – Luis felipe De jesus Munoz Apr 26 '18 at 13:04
• @LuisfelipeDejesusMunoz sorry, had my condition backwards. – HyperNeutrino Apr 26 '18 at 13:39

# Python 2, 126 bytes

all*any idea is by @HyperNeutrino, checkout his answer

def f(n):r=[sum(map(int,g[0::2]))>9for g in re.findall('(\d)(.*?)(\d)',n)if 3==g[1].count('?')];return all(r)*any(r)
import re


Try it online!

# Python 2, 125 bytes

Ouputs [] for false and [True] for true

def f(n):r=[sum(map(int,g[0::2]))>9for g in re.findall('(\d)(.*?)(\d)',n)if 3==g[1].count('?')];return r[:1]*all(r)
import re


Try it online!