xinyu04

摘要： Given two integers left and right that represent the range [left, right], return the bitwise AND of all numbers in this range, inclusive. Solution 暴露循 阅读全文

摘要： 10% of the people in a certain population use an illegal drug. A drug test yields the correct result 90% of the time, whether the person uses drugs or 阅读全文

摘要： Let’s play a game of Russian roulette. You are tied to your chair. Here’s a gun, a revolver. Here’s the barrel of the gun, six chambers, all empty. No 阅读全文

摘要： Assuming both players take turns what is the probability the player who goes first will lose at Russian roulette using a gun with six chambers? Soluti 阅读全文

摘要： You have a $6$ foot fence and at $15$ foot board. The sun is shining directly overhead. You want to lean your board against the fence so that as large 阅读全文

摘要： What is the value of $1, invested for one year at 100% interest, compounded infinitely? Solution Generally, the value of $1 invested for $n$ years at 阅读全文