This is a symbolic triangle of solving the problem. There are n the first line of symbols. Symbols for or - , the following symbols from each line up to be, with the No. 2 the following are+ , 2 months following its all different - to calculate how many different symbols triangle so that it contained and - the same number. Users can be said that the test data-input multiple-group n, to 0 to end the signs.

triangle
........\H11 -- 符号三角形.files





........\H11 -- 符号三角形.htm
........\sanjiao.cpp

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