main.py

import sys


def solve(data: str) -> str:
    tokens = list(map(int, data.split()))
    if not tokens:
        return ""
    it = iter(tokens)
    n = next(it)
    limit = next(it)
    weights = sorted(next(it) for _ in range(n))
    left = 0
    right = n - 1
    boxes = 0
    single_boxes = 0
    max_pair = 0
    while left <= right:
        boxes += 1
        if left == right:
            single_boxes += 1
            break
        if weights[left] + weights[right] <= limit:
            pair_weight = weights[left] + weights[right]
            if pair_weight > max_pair:
                max_pair = pair_weight
            left += 1
            right -= 1
        else:
            single_boxes += 1
            right -= 1
    return "\n".join(
        [
            f"boxes={boxes}",
            f"single_boxes={single_boxes}",
            f"max_pair={max_pair}",
        ]
    )


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