题目描述Bob really LOVES chocolate. He thinks he never gets enough. Imagine his joy when his parents told him that they would buy him many rectangular chocolate pieces for his birthday. A piece of chocola

题目描述The banquet hall of Computer Scientists’ Palace has a rectangular form of the size $M \times N$. It is necessary to lay hardwood floors in the hall. There are wood pieces of two forms: rectangles

题目描述The old King decided to divide the Kingdom into parts among his three sons. Each part is a polygonal area. Taking into account the bad temper of the middle son the King gave him a part of Kingdom

题目描述There is a syntactically correct boolean expression. The definition of syntactically correct expression follows as: “a”, “b”, “c”, …, “j” are syntactically correct expressions. If A is a correct

题目描述There are $N$ points given by their coordinates on a plane. All coordinates $(x_i, y_i)$ are integers in a range from $-10000$ up to $10000$ inclusive . It is necessary to construct a broken line

题目描述There are two boxes. There are $A$ balls in the first box, and $B$ balls in the second box. It is possible to move balls from one box to another. From one box into another one should move as many

题目描述There is a closed broken line on a plane with sides parallel to coordinate axes, without self-crossings and self-contacts. The broken line consists of $K$ segments. You have to determine, whether

题目描述There is a group of $N$ people which are numbered $1$ through $N$, and everyone of them has not less than $\left[ {N + 1 \over 2} \right]$ friends. A man with number $1$ has the book, which others

题目描述New Berland consists of $N$ islands, some of them are connected by bridges. There can be no more than one bridge between any pair of islands. Mr. President issued a law to paint all bridges. A bri

题目描述Archipelago Ber-Islands consists of $N$ islands that are vertices of equiangular and equilateral $N$-gon. Islands are clockwise numerated. Coordinates of island $N_1$ are $(x_1, y_1)$, and island