Šneki apie Martingailo sistemą :) Wikipedijoj viskas puikiai paaiškinta http://en.wikipedia.org/wiki/Martingale_%28roulette_system%29 "As an example, consider a bettor with an available fortune, or credit, of 2^43 (approximately 9 trillion) units, roughly the size of the current US national debt in dollars. With this very large fortune, the player can afford to lose on the first 42 tosses, but a loss on the 43rd cannot be covered. The probability of losing on the first 42 tosses is q^42, which will be a very small number unless tails are nearly certain on each toss. In the fair case where q