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1084. Broken Keyboard (20) On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those 阅读全文
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1006. Sign In and Sign Out (25) At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one 阅读全文
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1036. Boys vs Girls (25) This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all 阅读全文
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1092. To Buy or Not to Buy (20) Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There 阅读全文
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1083. List Grades (25) Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in no 阅读全文
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1011. World Cup Betting (20) With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players 阅读全文
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1027. Colors in Mars (20) People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented 阅读全文
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1008. Elevator (20) The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers denote at w 阅读全文
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1001. A+B Format (20) Calculate a + b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (u 阅读全文