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)
    timeline = next(it)
    diff = [0] * (timeline + 3)
    for _ in range(n):
        left = next(it)
        right = next(it)
        diff[left] += 1
        diff[right + 1] -= 1
    active = 0
    covered = 0
    peak = -1
    first_peak = 0
    for minute in range(timeline + 1):
        active += diff[minute]
        if active > 0:
            covered += 1
        if active > peak:
            peak = active
            first_peak = minute
    return "\n".join(
        [
            f"covered={covered}",
            f"peak={peak}",
            f"first_peak={first_peak}",
        ]
    )


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