Student Grades

#!/usr/local/bin/python3.7
# -*- coding: utf-8 -*import

records = {}

for _ in range(int(input())):
    (name, grade) = input().split(" ")
    if name not in records:
        records[name] = []
    records[name].append(f'{float(grade):.2f}')

for key, value in records.items():
    print(f'{key} -> {" ".join(value)} (avg: {(sum(map(float, value)) / len(value)):.2f})')