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984. Equation with tg

Time Limit:	1 seconds
Memory Limit:	65536KB
Points:	5

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Требуется найти корень уравнение tg(x)=x+k, лежащий в интервале от 0 до Pi/2

Input

Вводится одно вещественное число k в диапазоне от 1.0 до 1000.0

Output

Выведите корень уравнения x с точностью до 6 знаков после десятичной точки

Sample

Input	Output
1	1.132267

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Sorted Problems /

Algebra, analysis /

984.

19. Open brackets

6. Polynom's Roots

We can all benefit by doing occasional "toy" programs, when artificial restrictions are set up, so that we are forced to push our abilities to the limit. The art of tackling miniproblems with all our energy will sharpen our talents for the real problems. Donald E. Knuth.

time generating 0.453 sec.

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