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Description Mishka is a little polar bear. As known, little bears loves spending their free time playing dice for chocolates. Once in a wonderful sunn 阅读全文
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Description The Little Elephant very much loves sums on intervals. This time he has a pair of integers l and r (l ≤ r). The Little Elephant has to fin 阅读全文
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Description The Little Elephant loves sortings. He has an array a consisting of n integers. Let's number the array elements from 1 to n, then the i-th 阅读全文
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Description The Little Elephant loves Ukraine very much. Most of all he loves town Rozdol (ukr. "Rozdil"). However, Rozdil is dangerous to settle, so 阅读全文
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Description Sergei B., the young coach of Pokemons, has found the big house which consists of n flats ordered in a row from left to right. It is possi 阅读全文
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Description Vasya has the square chessboard of size n × n and m rooks. Initially the chessboard is empty. Vasya will consequently put the rooks on the 阅读全文
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Description There are n cards (n is even) in the deck. Each card has a positive integer written on it. n / 2 people will play new card game. At the be 阅读全文
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Description Ari the monster always wakes up very early with the first ray of the sun and the first thing she does is feeding her squirrel. Ari draws a 阅读全文
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Description Galois is one of the strongest chess players of Byteforces. He has even invented a new variant of chess, which he named «PawnChess». This 阅读全文
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Description Vasya has n days of vacations! So he decided to improve his IT skills and do sport. Vasya knows the following information about each of th 阅读全文