CCC '12 J2 - Sounds fishy!

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Points: 3
Time limit: 2.0s
Memory limit: 64M
Problem type
Canadian Computing Competition: 2012 Stage 1, Junior #2

A fish-finder is a device used by anglers to find fish in a lake. If the fish-finder finds a fish, it will sound an alarm. It uses depth readings to determine whether to sound an alarm. For our purposes, the fish-finder will decide that a fish is swimming past if:

  • there are four consecutive depth readings which form a strictly increasing sequence (such as 3 4 7 9) (which we will call "Fish Rising") or
  • there are four consecutive depth readings which form a strictly decreasing sequence (such as 9 6 5 2) (which we will call "Fish Diving"), or
  • there are four consecutive depth readings which are identical (which we will call "Constant Depth").

All other readings will be considered random noise or debris, which we will call "No Fish". Your task is to read a sequence of depth readings and determine if the alarm will sound.

Input Specification

The input will be four positive integers, representing the depth readings. Each integer will be on its own line of input.

Output Specification

The output is one of four possibilities. If the depth readings are increasing, then the output should be Fish Rising. If the depth readings are decreasing, then the output should be Fish Diving. If the depth readings are identical, then the output should be Fish At Constant Depth. Otherwise, the output should be No Fish.

Sample Input 1

30
10
20
20

Output for Sample Input 1

No Fish

Sample Input 2

1
10
12
13

Output for Sample Input 2

Fish Rising

Comments


  • 2
    iiGam_r  commented on Feb. 17, 2021, 11:34 a.m.

    Hints for anyone coming across this comment:

    • For the "No fish", look closely at what it says!
    • Look at the example for the pattern sequence for both 1st and 2nd pattern! Once you figure it out, it should be easy!
    • And last, but not least, for the "Fish At Constant Depth", don't overthink it! It's easier than it seems!

    Hope these hints helped you! Upvote if it did! Good luck!


  • 22
    2405873453  commented on Jan. 25, 2020, 5:09 p.m.

    remember you should not output"constant depth", it actually requires you to output "Fish At Constant Depth"


    • 1
      Mahdi_Jenhani  commented on Jan. 26, 2021, 3:59 p.m.

      Thank you sooooo much


    • 1
      Badmode  commented on Dec. 20, 2020, 11:30 p.m.

      Thank you so much you just saved me from another hour of confusion <3


  • 8
    SpicyEnch14  commented on Jan. 20, 2020, 12:56 p.m.

  • -11
    silentes  commented on Oct. 17, 2018, 11:47 a.m.

    This comment is hidden due to too much negative feedback. Click here to view it.


    • -10
      geese  commented on Oct. 17, 2018, 12:18 p.m.

      This comment is hidden due to too much negative feedback. Click here to view it.


    • -13
      DKLS2  commented on Oct. 17, 2018, 12:12 p.m.

      This comment is hidden due to too much negative feedback. Click here to view it.


  • 2
    12weareunited  commented on Aug. 31, 2018, 11:28 p.m.

    Thanks for the help


  • -10
    12weareunited  commented on Aug. 30, 2018, 2:48 p.m.

    This comment is hidden due to too much negative feedback. Click here to view it.


    • 5
      segfault  commented on Aug. 30, 2018, 4:46 p.m.

      The first combination is simply that the first number must be strictly smaller than the second number, the second number strictly smaller than the third number, and the third number strictly smaller than the fourth number.

      Keep in mind that there are 3 more conditions which you need to watch out for.


  • 56
    Mr_Lim  commented on March 9, 2018, 9:26 a.m.

    In the description of the question it says "Constant Depth" is one of the alarm triggers. In the output specification it says "Fish At Constant Depth" which is the actual required output. The description should be changed to be consistent with the actual output specification.


    • 2
      Lithium  commented on July 7, 2020, 6:28 p.m.

      this was really helpful cus i had it at "Constant Depth" instead of "Fish At Constant Depth" and I didnt know what i didnt wrong untill i read this thanks


    • 6
      RonldLiu  commented on Jan. 20, 2020, 4:23 a.m.

      I like how the most important comment is at the bottom.


      • 2
        1jiangand2  commented on July 8, 2020, 10:39 a.m.

        At least someone else commented it and it's at the top now.