結果
問題 | No.875 Range Mindex Query |
ユーザー | ccppjsrb |
提出日時 | 2019-11-07 22:23:31 |
言語 | Go (1.22.1) |
結果 |
AC
|
実行時間 | 427 ms / 2,000 ms |
コード長 | 3,290 bytes |
コンパイル時間 | 15,071 ms |
コンパイル使用メモリ | 221,104 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-15 00:46:37 |
合計ジャッジ時間 | 18,654 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge5 |
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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 | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,812 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 1 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 239 ms
6,940 KB |
testcase_12 | AC | 190 ms
6,940 KB |
testcase_13 | AC | 169 ms
6,944 KB |
testcase_14 | AC | 164 ms
6,940 KB |
testcase_15 | AC | 233 ms
6,944 KB |
testcase_16 | AC | 374 ms
6,944 KB |
testcase_17 | AC | 409 ms
6,940 KB |
testcase_18 | AC | 427 ms
6,940 KB |
ソースコード
package main import ( "bufio" "fmt" "math" "os" "strconv" ) func getScanner(fp *os.File) *bufio.Scanner { scanner := bufio.NewScanner(fp) scanner.Split(bufio.ScanWords) scanner.Buffer(make([]byte, 500001), 500000) return scanner } func getNextString(scanner *bufio.Scanner) string { scanner.Scan() return scanner.Text() } func getNextInt(scanner *bufio.Scanner) int { i, _ := strconv.Atoi(getNextString(scanner)) return i } func getNextInt64(scanner *bufio.Scanner) int64 { i, _ := strconv.ParseInt(getNextString(scanner), 10, 64) return i } func getNextUint64(scanner *bufio.Scanner) uint64 { i, _ := strconv.ParseUint(getNextString(scanner), 10, 64) return i } func getNextFloat64(scanner *bufio.Scanner) float64 { i, _ := strconv.ParseFloat(getNextString(scanner), 64) return i } func main() { fp := os.Stdin wfp := os.Stdout if len(os.Args) > 1 { fp, _ = os.Open(os.Args[1]) if len(os.Args) > 2 { wfp, _ = os.Create(os.Args[2]) } } scanner := getScanner(fp) writer := bufio.NewWriter(wfp) n := getNextInt(scanner) q := getNextInt(scanner) seg := Segment{} seg.init(n) for i := 0; i < n; i++ { a := getNextInt(scanner) seg.minimize(i, a) } for i := 0; i < q; i++ { t := getNextInt(scanner) l := getNextInt(scanner) - 1 r := getNextInt(scanner) - 1 if t == 1 { ol := seg.bucket[0][l] or := seg.bucket[0][r] seg.minimize(l, or) seg.minimize(r, ol) continue } fmt.Fprintln(writer, seg.rangeMinIndex(l, r+1)+1) } writer.Flush() } // Segment ... type Segment struct { n, h, i, chunk, inf int unit []int bucket [][]int } func (seg *Segment) init(n int) { seg.n = n seg.unit = make([]int, 1) seg.unit[0] = 1 seg.bucket = make([][]int, 1) seg.bucket[0] = make([]int, n) chunk := 8 for i := 0; n > 1; i++ { n = (n-1)/chunk + 1 seg.bucket = append(seg.bucket, make([]int, n)) seg.unit = append(seg.unit, seg.unit[i]*chunk) } seg.h = len(seg.unit) seg.chunk = chunk seg.inf = math.MaxInt32 } func (seg *Segment) minimize(index, value int) { seg.bucket[0][index] = value for seg.i = 0; seg.i < seg.h-1; seg.i++ { s := index - index%seg.chunk t := s + seg.chunk if t > len(seg.bucket[seg.i]) { t = len(seg.bucket[seg.i]) } parent := index / seg.chunk min := seg.inf for i := s; i < t; i++ { if min > seg.bucket[seg.i][i] { min = seg.bucket[seg.i][i] } } seg.bucket[seg.i+1][parent] = min index /= seg.chunk } } func (seg *Segment) min(l, r int) int { if seg.n < r { r = seg.n } min := seg.inf for index := l; index < r; index += seg.unit[seg.i] { for seg.i = 0; seg.i < seg.h-1 && index%seg.unit[seg.i+1] == 0; seg.i++ { if index+seg.unit[seg.i+1] >= r { break } } if min > seg.bucket[seg.i][index/seg.unit[seg.i]] { min = seg.bucket[seg.i][index/seg.unit[seg.i]] } } return min } func (seg *Segment) rangeMinIndex(l, r int) int { value := seg.min(l, r) for index := l; index < r; index += seg.unit[seg.i] { for seg.i = 0; seg.i < seg.h-1 && index%seg.unit[seg.i+1] == 0; seg.i++ { if index+seg.unit[seg.i+1] >= r { break } if seg.bucket[seg.i+1][index/seg.unit[seg.i+1]] == value { break } } if seg.bucket[0][index] == value { return index } } return -1 }