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While watching tv I saw a quiz, suppose you have a 100 euro banknote, how often can you change that note into other notes ( including another 100e note )? In Europe we have 100, 50, 20, 10 and 5 euro notes. For example changing my 100e note to 2x50e or to 1x50e+5x10e or 2x20e + 1x10 + 10x5. Here is my try to solve the puzzle, but it is more a try and error than a solve.
my \$cnt; for my \$f ( 0 .. 20 ) { for my \$z ( 0 .. 10 ) { for my \$zw ( 0 .. 5 ) { for my \$fu ( 0 .. 2 ) { for my \$hu ( 0 .. 1 ) { \$cnt++ if \$f * 5 + \$z * 10 + \$zw * 20 + \$fu * 50 + \$hu * 100 + == 100; } } } } } print \$cnt;
How would you do it?
Boris

2004-11-11 Edited by Arunbear: Changed title from 'How to solve this puzzle in a better way?', as per Monastery guidelines

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