Matrix Determinant Oneliner

det = lambda m:(lambda o:(lambda k,d:sum(map(k,(d[n:2*o*o+o+n:o*2+1]for n in range(o))))-sum(map(k,(d[n+o:2*o*o+o+n:o*2-1]for n in range(o)))))(lambda t:(lambda f,a:f(f,a))(lambda f,a:a[0]*f(f,a[1:])if a else 1,t),sum((2*m[o*a:o*a+o]for a in range(o)),[])))(int(len(m)**.5))