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3025, the figure has a unique character : it divided into noticing, 30 and 25 to make it add up for square, or (30 25) 2, is equal to 3025 itself. Requests of this nature out with the full four-digit.* Subject algorithm design and analysis of this nature is not the four-digit distribution, exhaustive method can be used for all four-digit judgment, thereby screening out with the four-digit of this nature. The specific algorithm can be admitted as a four-digit, its deadline for the two parts, with two of a, b for two after, and then use the formula and judgment.
Packet : 9927400求具有abcd=(ab cd)2性质的四位数.rar filelist
求具有abcd=(ab+cd)2性质的四位数.txt