2001 Canadian Computing Competition, Stage 1

Problem J4/S2: Spirals

A spiral of numbers can start and end with any positive integers less than 100. Write a program which will accept two positive integers x and y as input, and output a list of numbers from x to y inclusive, shown in a spiral. You may assume that the end value is greater than or equal to the start value.

A spiral starts with the first number in the centre. The next number appears immediately below the first number. The spiral continues with the numbers increasing in a counter-clockwise direction until the last number is printed.

Sample Input 1

10
27

Sample Output 1

      27 26
16 15 14 25
17 10 13 24
18 11 12 23
19 20 21 22

Sample Input 2

7
12

Sample Output 2

12 11
 7 10
 8  9

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Best Solutions

Point Value: 5
Time Limit: 2.00s
Memory Limit: 16M
Added: Oct 02, 2008

Languages Allowed:
C++03, PAS, C, HASK, ASM, RUBY, PYTH2, JAVA, PHP, SCM, CAML, PERL, C#, C++11, PYTH3

Comments (Search)

In C++, initialization only occurs for global arrays. If you declare a variable within int main or another function, then it contains a random value.

The exception is for classes that have default constructors, or data items declared static. However, it only takes an extra second to type ={0}, so make sure you do it...

so it worked at school and on my comp, but not on the judge