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| // @Title: 最多可达成的换楼请求数目 (Maximum Number of Achievable Transfer Requests)
// @Author: 15816537946@163.com
// @Date: 2022-02-28 10:39:38
// @Runtime: 72 ms
// @Memory: 6.7 MB
func maximumRequests(n int, requests [][]int) (ans int) {
next:
for mask := 0; mask < 1<<len(requests); mask++ {
cnt := bits.OnesCount(uint(mask))
if cnt <= ans {
continue
}
delta := make([]int, n)
for i, r := range requests {
if mask>>i&1 == 1 {
delta[r[0]]++
delta[r[1]]--
}
}
for _, d := range delta {
if d != 0 {
continue next
}
}
ans = cnt
}
return
}
|