Problem Description we define f(A) = 1, f(a) = -1, f(B) = 2, f(b) = -2, … f(Z) = 26, f(z) = -26; Give you a letter x and a number y , you should output the ...
Consider the natural numbers from 1 to N. By associating to each number a sign (+ or -) and calculating the value of this expression we obtain a sum S. The prob...
A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set. Here’s a 4 x 4 matri...
DescriptionBackground Everybody hates Raymond. He’s the largest stamp collector on planet earth and because of that he always makes fun of all the others at ...
Problem Description There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. From ...
Computing the exact number of ways that N things can be taken M at a time can be a great challenge when N and/or M become very large. Challenges are the stuff o...
One of the first users of BIT’s new supercomputer was Chip Diller. He extended his exploration of powers of 3 to go from 0 to 333 and he explored taking various...
Problem Description Farmer John made a profit last year! He would like to invest it well but wonders how much money he will make. He knows the interest rate R...
