結果
問題 | No.1095 Smallest Kadomatsu Subsequence |
ユーザー |
|
提出日時 | 2021-12-20 08:54:31 |
言語 | Go (1.23.4) |
結果 |
AC
|
実行時間 | 319 ms / 2,000 ms |
コード長 | 1,922 bytes |
コンパイル時間 | 14,896 ms |
コンパイル使用メモリ | 230,912 KB |
実行使用メモリ | 16,000 KB |
最終ジャッジ日時 | 2024-09-15 15:13:44 |
合計ジャッジ時間 | 19,864 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 30 |
ソースコード
package mainimport ("fmt""bufio""os""sort""math")func Min(a, b int) int {if a < b {return a} else {return b}}type SegmentTree struct {n inttree []int}func newSegmentTree(n int) *SegmentTree{sp := new(SegmentTree)sp.n = 1for sp.n < n {sp.n *= 2}sp.tree = make([]int, 2*sp.n)for i := 0; i < 2*sp.n; i++ {sp.tree[i] = math.MaxInt64}return sp}func (this *SegmentTree) set(idx, x int) {idx += this.nthis.tree[idx] = xfor idx > 0 {idx >>= 1this.tree[idx] = Min(this.tree[2 * idx], this.tree[2 * idx + 1])}}func (this *SegmentTree) query(lt, rt int) int {lt += this.nrt += this.nvl, vr := math.MaxInt64, math.MaxInt64for rt - lt > 0 {if lt & 1 != 0 {vl = Min(vl, this.tree[lt])lt++}if rt & 1 != 0 {rt--vr = Min(this.tree[rt], vr)}lt >>= 1rt >>= 1}return Min(vl, vr)}func main() {r := bufio.NewReader(os.Stdin)w := bufio.NewWriter(os.Stdout)defer w.Flush()var N intfmt.Fscan(r, &N)A := make([][2]int, N)for i := 0; i < N; i++ {var x intfmt.Fscan(r, &x)A[i] = [2]int{x, i}}sort.Slice(A,func(i, j int) bool {if A[i][0] < A[j][0] {return true} else if A[i][0] > A[j][0] {return false} else {return A[i][1] < A[j][1]}})res := math.MaxInt64st1 := newSegmentTree(N)for i := 0; i < N; i++ {a, idx := A[i][0], A[i][1]st1.set(idx, a)lt := st1.query(0, idx)rt := st1.query(idx + 1, N)if lt == math.MaxInt64 || rt == math.MaxInt64 {continue}res = Min(res, lt + rt + a)}st2 := newSegmentTree(N)for i := N-1; i >= 0; i-- {a, idx := A[i][0], A[i][1]st2.set(idx, a)lt := st2.query(0, idx)rt := st2.query(idx + 1, N)if lt == math.MaxInt64 || rt == math.MaxInt64 {continue}res = Min(res, lt + rt + a)}if res == math.MaxInt64 {fmt.Fprintln(w, -1)} else {fmt.Fprintln(w, res)}}