A+B for Polynomials

def solve(p1, p2):
    from collections import defaultdict
    poly = defaultdict(float)
    for term in p1.split(';'):
        parts = term.split(',')
        coef, exp = float(parts[0]), int(parts[1])
        poly[exp] += coef
    for term in p2.split(';'):
        parts = term.split(',')
        coef, exp = float(parts[0]), int(parts[1])
        poly[exp] += coef
    exp_sorted = sorted(poly.keys(), reverse=True)
    result = []
    for e in exp_sorted:
        if abs(poly[e]) > 0.001:
            result.append((e, poly[e]))
    output = [str(len(result))]
    for e, c in result:
        output.append(f'{e} {c:.1f}')
    print(' '.join(output))