Imagine you have a special keyboard with the following keys: 1. A 2. Ctrl+A 3. Ctrl+C 4. Ctrl+V where CTRL+A, CTRL+C, CTRL+V each acts as one function key for “Select All”, “Copy”, and “Paste” operations respectively.

If you can only press the keyboard for N times (with the above four keys), please write a program to produce maximum numbers of A. If possible, please also print out the sequence of keys.

That is to say, the input parameter is N (No. of keys that you can press), the output is M (No. of As that you can produce).













A Most Effective Solution Is Given at
www.ihas1337code.com/2011/01/ctrla-ctrlc-ctrlv.html