N, M = map(int, input().split()) max_para = [0] * M set_list = [set()] * M for i in range(N): para = list(map(int, input().split())) for j in range(M): if para[j] == max_para[j]: set_list[j].add(i) elif para[j] > max_para[j]: max_para[j] = para[j] set_list[j] = {i} ans_set = set() for set_list_i in set_list: ans_set |= set_list_i ans = len(ans_set) print(ans)