CCC '18 J1 - Telemarketer or not?

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Points: 3
Time limit: 3.0s
Memory limit: 256M

Problem type
Canadian Computing Competition: 2018 Stage 1, Junior #1

Here at the Concerned Citizens of Commerce (CCC), we have noted that telemarketers like to use seven-digit phone numbers where the last four digits have three properties. Looking just at the last four digits, these properties are:

  • the first of these four digits is an 8 or 9;
  • the last digit is an 8 or 9;
  • the second and third digits are the same.

For example, if the last four digits of the telephone number are 8229, 8338, or 9008, these are telemarketer numbers.

Write a program to decide if a telephone number is a telemarketer number or not, based on the last four digits. If the number is not a telemarketer number, we should answer the phone, and otherwise, we should ignore it.

Input Specification

The input will be 4 lines where each line contains exactly one digit in the range from 0 to 9.

Output Specification

Output either ignore if the number matches the pattern for a telemarketer number; otherwise, output answer.

Sample Input 1


Sample Output 1


Explanation for Sample Output 1

The first digit is 9, the last digit is 8, and the second and third digit are both 6, so this is a telemarketer number.

Sample Input 2


Sample Output 2


Explanation for Sample Output 2

The first digit is 5, and so this is not a telemarketer number.


  • -2
    Broken_Dreams  commented on April 21, 2022, 7:18 p.m.


  • 4
    cyopotatoe  commented on June 2, 2020, 8:58 p.m.

    So I wanted to see if capitalization counts. It does. Beware, unsuspecting CCC users!

  • 23
    Joethenerd  commented on Feb. 20, 2019, 10:04 a.m.

    Man spelling counts! Couldn't get this 3 pointer cause I wrote ingore instead of ignore. And i dint realize for the longest time.

    • 0
      Bigg_Pete  commented on Dec. 23, 2021, 12:09 p.m.

      I had the same problem, except I was using "Ignore" and "Answer" instead of "ignore" and "answer". Case sensitivity is a killer here.

  • 8
    1DontKnowHowIGotHere  commented on April 30, 2018, 12:24 p.m.

    Misread a part of the question.

  • -3
    1DontKnowHowIGotHere  commented on April 27, 2018, 8:33 p.m. edited

    I think there is a problem with this problem, the inputs should be switched.

    • 7
      CoolNoobyBooby  commented on Aug. 22, 2018, 4:35 p.m.

      Note that:

      ignore is when the first and last digits are either 8 or 9 and the two of the middle are the same, not answer

      That may be the problem

    • 3
      TimothyW553  commented on April 28, 2018, 9:47 p.m.

      Also, you should probably read the question again because your if statements are wrong

    • 40
      Roynaruto  commented on April 28, 2018, 4:51 p.m.

      Considering that:

      1. This was a CCC contest question, so the test datas were checked over
      2. There are 300 correct submissions on DMOJ

      Perhaps you should check over your code.

      • -74
        TimothyW553  commented on April 28, 2018, 9:43 p.m.

        This comment is hidden due to too much negative feedback. Show it anyway.

        • -26
          cyopotatoe  commented on June 2, 2020, 9:00 p.m.

          This comment is hidden due to too much negative feedback. Show it anyway.