a_p

x=input().split()
r=float(x[0]) #raza
a=float(x[1]) #acceleratia
N=int(x[2]) #nr de linii
m_p=1.67e-27
m_e=9.11e-31
mase=[]
necunoscute=0
for i in range(N):
    E=float(input())
    #d = 1.5 * 3.1415 * r * (10e3)
    #v_patrat = 2 * a * d
    #m=2*E/v_patrat
    m=E/(1.5*3.1415*r*10e2*a)

    if m>(m_e-0.1*m_e) and m<(m_e+0.1*m_e):
        m_modificat=m*pow(10,31)
        mase.append("%.6fe-31"%round(m_modificat,6))
    elif m>(m_p-0.1*m_p) and m<(m_p+0.1*m_p):
        m_modificat=m*pow(10,27)
        mase.append("%.6fe-27"%round(m_modificat,6))
    else:
        necunoscute+=1

for i in mase:
    print(i)

probabilitate_nescunoscute=necunoscute/N
print("%.4f"%probabilitate_nescunoscute)