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»ïÂ÷ ¹æÁ¤½Ä ax^3+bx^2+cx+d=0, (a¡Á0) ÀÇ ±Ù°ú °è¼ö¿ÍÀÇ °ü°è¸¦ ±¸ÇÑ´Ù.

a ·Î ³ª´©¸é, x^3+(b/a)x^2+(c/a)x+(d/a)=0

¼¼ ±ÙÀ» ¥á, ¥â, ¥ã ¶ó Çϸé,

(x-¥á)(x-¥â)(x-¥ã)=0

x^3-(¥á+¥â+¥ã)x^2+(¥á¥â+¥â¥ã+¥ã¥á)x-¥á¥â¥ã=0

ÀÌ°í, À§ÀÇ µÎ ½ÄÀÌ °°À¸¹Ç·Î,

¥á+¥â+¥ã = -b/a

¥á¥â+¥â¥ã+¥ã¥á = c/a

¥á¥â¥ã = -d/a

°¡ µÈ´Ù.
¡à input data


¢º ¥á+¥â+¥ã


¢º ¥á¥â+¥â¥ã+¥ã¥á


¢º ¥á¥â¥ã


¡Ø ÀÌ »çÀÌÆ®´Â ±¤°í¼öÀÍÀ¸·Î ¿î¿µµË´Ï´Ù.

¡Ø »¡°£»ö ¹ØÁٺκп¡ ÀڷḦ ÀÔ·ÂÇϼ¼¿ä.
¡Ø Input data on
red underlines.

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