xuanweiace的博客

题干：You are playing a two player game. Initially there are n integer numbers in an array and player A and B get chance to take them alternatively. Each player can take one or more numbers from the le...

题干：Tigers in the Sunderbans wish to travel freely among theNfields (numbered from1toN), even though they are separated by trees. The tigers wish to maintain trails between pairs of fields so th...

题干：You are in a maze; seeingndoors in front of you in beginning. You can choose any door you like. The probability for choosing a door is equal for all doors.If you choose theithdoor, it can e...

题干：You are in a cave, a long cave! The cave can be represented by a1 x Ngrid. Each cell of the cave can contain any amount of gold.Initially you are in position1. Now each turn you throw a perf...

题干：Rimi learned a new thing about integers, which is - any positive integer greater than1can be divided by its divisors. So, he is now playing with this property. He selects a numberN. And he cal...

题干：As Harry Potter series is over, Harry has no job. Since he wants to make quick money, (he wants everything quick!) so he decided to rob banks. He wants to make a calculated risk, and grab as much...

题干：Sometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party where there are23people including you. What is the probab...