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Hunan Normal University
College of Information Science and Engineering
解方程2017
Time Limit: 1000ms, Special Time Limit:2500ms, Memory Limit:32768KB
Total submit users: 7, Accepted users: 7
Problem 11783 : No special judgement
Problem description
  给定一个4次方程,再给定一个定义域,就在该定义域上方程的解。保证定义域内有唯一解且对应的4次函数单调。方程形式为:a0+a1x+a2x^2+a3x^3+a4x^4 = 0。

Input
  输入只有一行,一共7个绝对值不超过10的整数。前五个数分别是a0, a1, a2, a3, a4,表示相应项的系数,后两个数是x1, x2,表示定义域[x1, x2]。

Output
  输出一行为结果。保留3位小数。

Sample Input
0 0 0 0 1 0 1
Sample Output
0.000
Problem Source
  HUNNU Contest 

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