main.py

import sys


def level(score: float) -> str:
    if score >= 85:
        return "A"
    if score >= 70:
        return "B"
    return "C"


def solve(data: str) -> str:
    tokens = data.split()
    if not tokens:
        return ""
    it = iter(tokens)
    n = int(next(it))
    total = 0.0
    best_name = ""
    best_score = -10 ** 18
    levels = []
    for _ in range(n):
        name = next(it)
        water = int(next(it))
        trade = int(next(it))
        vegetation = int(next(it))
        score = water * 0.4 + trade * 0.35 + vegetation * 0.25
        total += score
        levels.append(f"{name}:{level(score)}")
        if score > best_score or (abs(score - best_score) < 1e-9 and name < best_name):
            best_name = name
            best_score = score
    return "\n".join(
        [
            f"best={best_name} {best_score:.2f}",
            f"levels={','.join(levels)}",
            f"average={total / n:.2f}",
        ]
    )


if __name__ == "__main__":
    sys.stdout.write(solve(sys.stdin.read()).strip())
    sys.stdout.write("\n")