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示例
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三角形开始
1;
0、4；
0, -4, 7;
0, 4, -7, 10;
0, 0, 0, -10, 13;
0, -4, 7, 0, -13, 16;
0, 0, 0, 0, 0, -16, 19;
0, 4, -7, 10, 0, 0, -19, 22;
0, 0, 0, 0, 0, 0, 0, -22, 25;
0，0，0，-10，13，0，0，0，-25，28；
0, 0, 0, 0, 0, 0, 0, 0, 0, -28, 31;
0, -4, 7, 0, -13, 16, 0, 0, 0, 0, -31, 34;
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -34, 37;
的反转
1;
0, 1/4;
0, 1/7, 1/7;
0, 0, 1/10, 1/10;
0, 0, 1/13, 1/13, 1/13;
0, 0, 0, 1/16, 1/16, 1/16;
0, 0, 0, 1/19, 1/19, 1/19, 1/19;
0, 0, 0, 0, 1/22, 1/22, 1/22, 1/22;
0, 0, 0, 0, 1/25, 1/25, 1/25, 1/25, 1/25;
0, 0, 0, 0, 0, 1/28, 1/28, 1/28, 1/28, 1/28;
0, 0, 0, 0, 0, 1/31, 1/31, 1/31, 1/31, 1/31, 1/31;
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