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This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+ 阅读全文
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Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to pl 阅读全文
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The end of the school year is near and Ms. Manana, the teacher, will soon have to say goodbye to a yet another class. She decided to prepare a goodbye 阅读全文
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A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence ( a1, a2, ..., aN) be any sequence ( ai1, 阅读全文
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A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1, x2, ..., xm > another 阅读全文
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下图是个数字三角，请编写一个程序计算从顶部至底部某处一条路径，使得该路径所经过的数字总和最大。 7 3 8 8 1 0 2 7 4 4 1． 每一步可沿左斜线向下或右斜线向下走； 2． 1<=三角形行数<=100 3． 三角形中的数字为整数 0，1，……，99。 4． 如果有多种情况结果都最大，任意 阅读全文