Sex-is-Fun Equation
Let –EOF (The Ultimate Computing & Technology Blog) — 328 words The Permanent URL is: Sex-is-Fun Equation (AMP Version)
Tag: math
Interview Question: 2^n – 1 divide by 7
October 14, 2012
algorithms, beginner, bit hacks, brute force, implementation, interview questions, math, programming languages, python, tricks
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Q: n is a none-negative numbers, in order to let divides perfectly 7, characterise n. A: in binary representation is n ones. And 7 in binary is 111. The …
Simple Calculation without Integration
Q: Compute without integration. A: We know , Therefore, Therefore, The normal method: –EOF (The Ultimate Computing & Technology Blog) — 690 words The Permanent URL is: Simple Calculation …
Proof without Words: 1 + 2 + 3 + .. (n – 1) = Cn2
Google ‘Proof without Words‘ you will find some interesting figures that are easy to understand. For example, the following figure is a vivid proof of the math formula Hint: …
Codeforces: B. T-primes
October 4, 2012
algorithms, beginner, brute force, codeforces, java, math, programming languages
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The problem is from codeforces: http://www.codeforces.com/problemset/problem/230/B The input of the numbers exceed a 4-byte integer, therefore, a long type (int64) should be used in Java. I feel like I …