結果
問題 | No.1288 yuki collection |
ユーザー | 草苺奶昔 |
提出日時 | 2023-03-11 20:35:54 |
言語 | Go (1.22.1) |
結果 |
AC
|
実行時間 | 757 ms / 5,000 ms |
コード長 | 3,911 bytes |
コンパイル時間 | 13,795 ms |
コンパイル使用メモリ | 218,440 KB |
実行使用メモリ | 17,364 KB |
最終ジャッジ日時 | 2023-10-18 10:17:57 |
合計ジャッジ時間 | 24,211 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge11 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
4,348 KB |
testcase_01 | AC | 1 ms
4,348 KB |
testcase_02 | AC | 2 ms
4,348 KB |
testcase_03 | AC | 2 ms
4,348 KB |
testcase_04 | AC | 2 ms
4,348 KB |
testcase_05 | AC | 1 ms
4,348 KB |
testcase_06 | AC | 1 ms
4,348 KB |
testcase_07 | AC | 2 ms
4,348 KB |
testcase_08 | AC | 3 ms
4,348 KB |
testcase_09 | AC | 2 ms
4,348 KB |
testcase_10 | AC | 3 ms
4,348 KB |
testcase_11 | AC | 1 ms
4,348 KB |
testcase_12 | AC | 2 ms
4,348 KB |
testcase_13 | AC | 682 ms
8,876 KB |
testcase_14 | AC | 662 ms
17,284 KB |
testcase_15 | AC | 538 ms
8,880 KB |
testcase_16 | AC | 528 ms
8,892 KB |
testcase_17 | AC | 686 ms
17,248 KB |
testcase_18 | AC | 744 ms
15,204 KB |
testcase_19 | AC | 696 ms
15,120 KB |
testcase_20 | AC | 710 ms
17,300 KB |
testcase_21 | AC | 535 ms
8,804 KB |
testcase_22 | AC | 527 ms
8,752 KB |
testcase_23 | AC | 610 ms
17,136 KB |
testcase_24 | AC | 717 ms
17,244 KB |
testcase_25 | AC | 721 ms
17,364 KB |
testcase_26 | AC | 757 ms
17,296 KB |
testcase_27 | AC | 290 ms
8,896 KB |
testcase_28 | AC | 351 ms
8,800 KB |
testcase_29 | AC | 349 ms
8,892 KB |
testcase_30 | AC | 14 ms
8,128 KB |
testcase_31 | AC | 20 ms
8,248 KB |
testcase_32 | AC | 21 ms
8,372 KB |
testcase_33 | AC | 135 ms
8,380 KB |
testcase_34 | AC | 176 ms
8,348 KB |
testcase_35 | AC | 164 ms
8,344 KB |
testcase_36 | AC | 170 ms
8,412 KB |
testcase_37 | AC | 188 ms
8,472 KB |
testcase_38 | AC | 140 ms
8,400 KB |
testcase_39 | AC | 135 ms
8,384 KB |
testcase_40 | AC | 5 ms
5,668 KB |
testcase_41 | AC | 1 ms
4,348 KB |
testcase_42 | AC | 1 ms
4,348 KB |
ソースコード
package main import ( "bufio" "fmt" "os" ) const INF int = 1e18 // 拆点 func removeYuki(s string, scores []int) int { n := len(s) A := func(i int) int { return i } B := func(i int) int { return n + 1 + i } C := func(i int) int { return 2*(n+1) + i } D := func(i int) int { return 3*(n+1) + i } E := func(i int) int { return 4*(n+1) + i } mcmf := NewMinCostFlow(5*n+5, A(0), E(n)) for i := 0; i < n; i++ { mcmf.AddEdge(A(i), A(i+1), n, 0) mcmf.AddEdge(B(i), B(i+1), n, 0) mcmf.AddEdge(C(i), C(i+1), n, 0) mcmf.AddEdge(D(i), D(i+1), n, 0) mcmf.AddEdge(E(i), E(i+1), n, 0) } for i := 0; i < n; i++ { if s[i] == 'y' { mcmf.AddEdge(A(i), B(i+1), 1, -scores[i]) } else if s[i] == 'u' { mcmf.AddEdge(B(i), C(i+1), 1, -scores[i]) } else if s[i] == 'k' { mcmf.AddEdge(C(i), D(i+1), 1, -scores[i]) } else if s[i] == 'i' { mcmf.AddEdge(D(i), E(i+1), 1, -scores[i]) } } slope := mcmf.Slope() res := 0 for _, s := range slope { res = max(res, -s[1]) } return res } func max(a, b int) int { if a > b { return a } return b } type MinCostFlow struct { AddEdge func(from, to, cap, cost int) Work func() (maxFlow int, minCost int) Slope func() [][2]int // (flow, cost) } func NewMinCostFlow(n, start, end int) *MinCostFlow { type neighbor struct { to int rid int // rid 为反向边在邻接表中的下标 cap int // 边的残量 cost int eid int // -1表示是反向边 } graph := make([][]neighbor, n) ei := 0 addEdge := func(from, to, cap, cost, eid int) { graph[from] = append(graph[from], neighbor{to, len(graph[to]), cap, cost, eid}) graph[to] = append(graph[to], neighbor{from, len(graph[from]) - 1, 0, -cost, -1}) } dist := make([]int, len(graph)) type vi struct{ v, i int } pre := make([]vi, len(graph)) spfa := func() bool { for i := range dist { dist[i] = INF } dist[start] = 0 inQueue := make([]bool, len(graph)) inQueue[start] = true queue := []int{start} for len(queue) > 0 { cur := queue[0] queue = queue[1:] inQueue[cur] = false for i, edge := range graph[cur] { if edge.cap == 0 { continue } next := edge.to if cand := dist[cur] + int(edge.cost); cand < dist[next] { dist[next] = cand pre[next] = vi{cur, i} if !inQueue[next] { queue = append(queue, next) inQueue[next] = true } } } } return dist[end] < INF } // ek Work := func() (maxFlow int, minCost int) { for spfa() { // 沿 st-end 的最短路尽量增广 flow := INF for cur := end; cur != start; { p := pre[cur] if c := graph[p.v][p.i].cap; c < flow { flow = c } cur = p.v } for cur := end; cur != start; { p := pre[cur] edge := &graph[p.v][p.i] edge.cap -= flow graph[cur][edge.rid].cap += flow cur = p.v } maxFlow += flow minCost += dist[end] * flow } return } Slope := func() (slope [][2]int) { maxFlow, minCost := 0, 0 for spfa() { // 沿 st-end 的最短路尽量增广 flow := INF for cur := end; cur != start; { p := pre[cur] if c := graph[p.v][p.i].cap; c < flow { flow = c } cur = p.v } for cur := end; cur != start; { p := pre[cur] edge := &graph[p.v][p.i] edge.cap -= flow graph[cur][edge.rid].cap += flow cur = p.v } maxFlow += flow minCost += dist[end] * flow slope = append(slope, [2]int{maxFlow, minCost}) } return } AddEdge := func(from, to, cap, cost int) { addEdge(from, to, cap, cost, ei) ei++ } return &MinCostFlow{ AddEdge: AddEdge, Work: Work, Slope: Slope, } } func main() { in := bufio.NewReader(os.Stdin) out := bufio.NewWriter(os.Stdout) defer out.Flush() var n int fmt.Fscan(in, &n) var s string fmt.Fscan(in, &s) scores := make([]int, n) for i := 0; i < n; i++ { fmt.Fscan(in, &scores[i]) } fmt.Fprintln(out, removeYuki(s, scores)) }