def greedy_thief(weights, values, M, K):
    items = list(zip(weights, values))
    items.sort(key=lambda x: x[1] / x[0], reverse=True)
    cap = M * K
    total_value = 0
    chosen = []
    for w, v in items:
        if w <= cap:
            chosen.append((w, v))
            cap -= w
            total_value += v
    return total_value, chosen


if __name__ == "__main__":
    weights = [2, 3, 4, 5, 9, 7, 3]
    values = [3, 4, 5, 8, 10, 7, 6]
    M = 2
    K = 10
    print(greedy_thief(weights, values, M, K))