#!/usr/bin/env python
import math

def rk3(h,tn,yn,ys,param=[]):
    k1 = ys(tn,yn,*param)
    k2 = ys(tn+h/2,yn+h*k1/2,*param)
    k3 = ys(tn+h,yn - h*k1 + 2*h*k2, *param)
    return tn+h, yn + h*(k1/3 + k2/3 + k3/3)

def main():
    U = lambda tn,f : math.sin(2*math.pi*tn*f)
    R = 5e3
    C = 1e-6
    us = lambda tn, un, f: (U(tn,f) - un)/(R*C)
    fc = 1.0/(2*math.pi*R*C)
    for f in [ 2**(i) * fc for i in range(-5,8)]:
        ucmax = 0
        ucmin = 0
        tn = 0
        un = 0
        for i in range(1000000):
            tn, un = rk3(0.000001, tn, un, us, [f])
            ucmax = max(un,ucmax)
            ucmin = min(un,ucmin)

        print(" %10.3f : %10.6f %10.6f" % (f,ucmax,ucmin))


if __name__ == '__main__':
    main()