Problem D
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 554 Accepted Submission(s): 387
Problem Description
Number guessing is a popular game between elementary-school kids. Teachers encourage pupils to play the game as it enhances their arithmetic skills, logical thinking, and following-up simple procedures. We think that, most probably, you too will master in few minutes. Here¡¯s one example of how you too can play this game: Ask a friend to think of a number, let¡¯s call it n0.
Then:
1. Ask your friend to compute n1 = 3 * n0 and to tell you if n1 is even or odd.
2. If n1 is even, ask your friend to compute n2 = n1/2. If, otherwise, n1 was odd then let your friend compute n2 = (n1 + 1)/2.
3. Now ask your friend to calculate n3 = 3 * n2.
4. Ask your friend to tell tell you the result of n4 = n3/9. (n4 is the quotient of the division operation. In computer lingo, ¡¯/¡¯ is the integer-division operator.)
5. Now you can simply reveal the original number by calculating n0 = 2 * n4 if n1 was even, or n0 = 2 * n4 + 1 otherwise.
Here¡¯s an example that you can follow: If n0 = 37, then n1 = 111 which is odd. Now we can calculate n2 = 56, n3= 168, and n4 = 18, which is what your friend will tell you. Doing the calculation 2 ¡Á n4 + 1 = 37 reveals n0.
Then:
1. Ask your friend to compute n1 = 3 * n0 and to tell you if n1 is even or odd.
2. If n1 is even, ask your friend to compute n2 = n1/2. If, otherwise, n1 was odd then let your friend compute n2 = (n1 + 1)/2.
3. Now ask your friend to calculate n3 = 3 * n2.
4. Ask your friend to tell tell you the result of n4 = n3/9. (n4 is the quotient of the division operation. In computer lingo, ¡¯/¡¯ is the integer-division operator.)
5. Now you can simply reveal the original number by calculating n0 = 2 * n4 if n1 was even, or n0 = 2 * n4 + 1 otherwise.
Here¡¯s an example that you can follow: If n0 = 37, then n1 = 111 which is odd. Now we can calculate n2 = 56, n3= 168, and n4 = 18, which is what your friend will tell you. Doing the calculation 2 ¡Á n4 + 1 = 37 reveals n0.
Input
Your program will be tested on one or more test cases. Each test case is made of a single positive number (0 < n0 < 1, 000, 000).
The last line of the input file has a single zero (which is not part of the test cases.)
The last line of the input file has a single zero (which is not part of the test cases.)
Output
For each test case, print the following line:
k. B Q
Where k is the test case number (starting at one,) B is either ¡¯even¡¯ or ¡¯odd¡¯ (without the quotes) depending on your friend¡¯s answer in step 1. Q is your friend¡¯s answer to step 4.
Note: There is a blank space before B.
k. B Q
Where k is the test case number (starting at one,) B is either ¡¯even¡¯ or ¡¯odd¡¯ (without the quotes) depending on your friend¡¯s answer in step 1. Q is your friend¡¯s answer to step 4.
Note: There is a blank space before B.
Sample Input
37 38 0
Sample Output
1. odd 18 2. even 19