摘要：E - One-Dimensional Battle Ships CodeForces - 567D Alice and Bob love playing one-dimensional battle ships. They play on the field in the form of a li
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摘要：K - Vanya and Scales CodeForces - 552C Vanya has a scales for weighing loads and weights of masses w0, w1, w2, ..., w100 grams where w is some integer
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摘要：C - King Arthur's Birthday Celebration POJ - 3682 King Arthur is an narcissist who intends to spare no coins to celebrate his coming K-th birthday. Th
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摘要：D - Ugly Problem HDU - 5920 Everyone hates ugly problems. You are given a positive integer. You must represent that number by sum of palindromic numbe
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摘要：Recently, Valery have come across an entirely new programming language. Most of all the language attracted him with template functions and procedures.
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摘要：A - A Simple Math Problem HDU - 5974 Given two positive integers a and b,find suitable X and Y to meet the conditions: X+Y=a Least Common Multiple (X,
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摘要：Beautiful Now HDU - 6351 Anton has a positive integer n, however, it quite looks like a mess, so he wants to make it beautiful after k swaps of digits
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摘要：Nash Equilibrium is an important concept in game theory. Rikka and Yuta are playing a simple matrix game. At the beginning of the game, Rikka shows an
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摘要：Today on a lecture about strings Gerald learned a new definition of string equivalency. Two strings a and b of equal length are called equivalent in o
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摘要：In HDU, you have to run along the campus for 24 times, or you will fail in PE. According to the rule, you must keep your speed, and your running dista
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摘要：Robbery Time Limit: 1000MS Memory Limit: 32768K Total Submissions: 1249 Accepted: 504 Description Inspector Robstop is very angry. Last night, a bank
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摘要：The Old Frog King lives on the root of an infinite tree. According to the law, each node should connect to exactly two nodes on the next level, formin
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摘要：A frog has just learned some number theory, and can't wait to show his ability to his girlfriend. Now the frog is sitting on a grid map of infinite ro
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摘要：Limak is a little bear who loves to play. Today he is playing by destroying block towers. He built n towers in a row. The i-th tower is made of hi ide
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摘要：The cows are having a picnic! Each of Farmer John's K (1 ≤ K ≤ 100) cows is grazing in one of N (1 ≤ N ≤ 1,000) pastures, conveniently numbered 1...N.
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摘要：You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subsequence aij such that the sum o
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摘要：One traveler travels among cities. He has to pay for this while he can get some incomes. Now there are n cities, and the traveler has m days for trave
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摘要：In the capital city of Berland, Bertown, demonstrations are against the recent election of the King of Berland. Berland opposition, led by Mr. Ovalny,
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摘要：Little Q loves playing with different kinds of graphs very much. One day he thought about an interesting category of graphs called ``Cool Graph'', whi
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摘要：Every year the cows hold an event featuring a peculiar version of hopscotch that involves carefully jumping from rock to rock in a river. The exciteme
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摘要：there are N ACMers in HDU team. ZJPCPC Sunny Cup 2007 is coming, and lcy want to select some excellent ACMers to attend the contest. There have been M
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摘要：Two players play a game. The game is played on a rectangular board with n × m squares. At the beginning of the game two different squares of the board
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摘要：To confuse the opponents, the Galactic Empire represents fractions in an unusual format. The fractions are represented as two sets of integers. The pr
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摘要：Matches Game Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 13264 Accepted: 7712 Description Here is a simple game. In this game, there ar
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摘要：Factstone Benchmark Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 5577 Accepted: 2524 Description Amtel has announced that it will releas
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摘要：Bridge over a rough river POJ - 3404 Bridge over a rough river Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 4427 Accepted: 1824 Descript
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摘要：Delta-wave HDU - 1030 A triangle field is numbered with successive integers in the way shown on the picture below. The traveller needs to go from the
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摘要：DNA Sorting Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 114211 Accepted: 45704 Description One measure of ``unsortedness'' in a sequenc
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摘要：Prime Number CodeForces - 359C Simon has a prime number x and an array of non-negative integers a1, a2, ..., an. Simon loves fractions very much. Toda
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摘要：Charm Bracelet Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 54588 Accepted: 22773 Description Bessie has gone to the mall's jewelry stor
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摘要：Basic Wall Maze Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 3384 Accepted: 1525 Special Judge Description In this problem you have to s
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摘要：Bin Packing Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 6410 Accepted: 2894 Description A set of n 1-dimensional items have to be packe
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摘要：Defining Moment Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 1660 Accepted: 760 Description As a homework assignment, you have been task
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摘要：Running a taxi station is not all that simple. Apart from the obvious demand for a centralised coordination of the cabs in order to pick up the custom
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摘要：Asteroids POJ - 3041 Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The grid
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摘要：An arithmetic progression is such a non-empty sequence of numbers where the difference between any two successive numbers is constant. This constant n
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摘要：Acm is a clever boy, and he developed a new game form the old Stone-Forfex-Cloth game. In this game, a number of children sit in a circle, each one sh
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