N=input().split()
A=[]
for n in N:
	s=0
	L=len(n)
	for i in range(L):
		if n[i]=='.':
			s,n=L-i-1,n[:i]*+n[i+1:]
			break
	A+=[int(n),s]
N=str(A[0]*10**A[3]+A[2]*10**A[1])
s=len(N)-A[1]-A[3]
print(N[:s]+["."+N[s:],""][all(n<'1'for n in N[s:])])