⚠️ 先到先得能配上几对

五个人、四台机器。每个人只会开其中几台，一台机器同时只能一个人用，一个人也只能占一台：这次按名单顺序来，每人挑第一台还空着的机器：

PEOPLE = ['阿岚', '小满', '阿泰', '南风', '北辰']
LIKE = {'阿岚': ['甲', '乙'], '小满': ['甲'], '阿泰': ['丙', '丁'],
        '南风': ['丙'],       '北辰': ['乙', '丁']}

PEOPLE = ['阿岚', '小满', '阿泰', '南风', '北辰']
LIKE = {'阿岚': ['甲', '乙'], '小满': ['甲'], '阿泰': ['丙', '丁'],
        '南风': ['丙'],       '北辰': ['乙', '丁']}

def greedy(people, like):
    used, m = set(), {}
    for p in people:
        for t in like[p]:
            if t not in used:
                used.add(t)
                m[p] = t
                break
    return len(m)

print(greedy(PEOPLE, LIKE))