from collections import deque
from typing import Optional


class DeletableDeque:
    """Deletable Deque: a deque that supports lazy deletion of values."""

    __slots__ = ["_set", "_deque"]

    def __init__(self, *initial_values: int) -> None:
        self._set = set()
        self._deque = deque([])

        if initial_values:
            for v in initial_values:
                self.append(v)

    def __contains__(self, value: int) -> bool:
        return value in self._set

    def __len__(self) -> int:
        return len(self._set)

    @property
    def is_empty(self) -> bool:
        """Return whether the deque has no values or not."""
        return len(self) == 0

    @property
    def top(self) -> Optional[int]:
        """Return the rightmost value from the deque.
        If the deque is empty, None is returned.
        """
        while self._deque and self._deque[-1] not in self._set:
            self._deque.pop()
        if not self._deque:
            return None
        return self._deque[-1]

    @property
    def topleft(self) -> Optional[int]:
        """Return the leftmost value from the deque.
        If the deque is empty, None is returned.
        """
        while self._deque and self._deque[0] not in self._set:
            self._deque.popleft()
        if not self._deque:
            return None
        return self._deque[0]

    def pop(self) -> Optional[int]:
        """Pop and return the rightmost value from the deque.
        If the deque is empty, None is returned.
        """
        while self._deque and self._deque[-1] not in self._set:
            self._deque.pop()
        if not self._deque:
            return None
        res = self._deque.pop()
        self._set.discard(res)
        return res

    def popleft(self) -> Optional[int]:
        """Pop and return the leftmost value from the deque.
        If the deque is empty, None is returned.
        """
        while self._deque and self._deque[0] not in self._set:
            self._deque.popleft()
        if not self._deque:
            return None
        res = self._deque.popleft()
        self._set.discard(res)
        return res

    def append(self, value: int) -> None:
        """Append value to the right side of the deque."""
        if value in self._set:
            return
        self._set.add(value)
        self._deque.append(value)

    def appendleft(self, value: int) -> None:
        """Append value to the left side of the deque."""
        if value in self._set:
            return
        self._set.add(value)
        self._deque.appendleft(value)

    def delete(self, value: int) -> None:
        """Delete value from the deque."""
        if value not in self._set:
            return
        self._set.discard(value)


def agc018_b():
    # https://atcoder.jp/contests/agc018/tasks/agc018_b
    import sys
    from collections import defaultdict

    readline = sys.stdin.buffer.readline

    N, M = map(int, readline().split())
    A = [DeletableDeque(*list(map(int, readline().split()))[::-1]) for _ in range(N)]

    res = 301
    for _ in range(M):
        cnt = defaultdict(int)
        for a in A:
            cnt[a.top] += 1

        popular_sport = max(cnt, key=cnt.get)
        res = min(res, cnt[popular_sport])
        for a in A:
            a.delete(popular_sport)

    print(res)


if __name__ == "__main__":
    agc018_b()


Measured memory_bytes: 13888