結果

問題 No.134 走れ！サブロー君
ユーザー maguroguma
提出日時 2019-06-29 12:29:58
言語 Go
(1.23.4)
結果
AC  
実行時間 22 ms / 5,000 ms
コード長 9,013 bytes
コンパイル時間 15,949 ms
コンパイル使用メモリ 236,896 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-07-02 05:31:10
合計ジャッジ時間 16,741 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
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ファイルパターン 結果
other AC * 15
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

package main
import (
    "bufio"
    "errors"
    "fmt"
    "io"
    "math"
    "os"
    "strconv"
)
/********** I/O usage **********/
//str := ReadString()
//i := ReadInt()
//X := ReadIntSlice(n)
//S := ReadRuneSlice()
//a := ReadFloat64()
//A := ReadFloat64Slice(n)
//str := ZeroPaddingRuneSlice(num, 32)
//str := PrintIntsLine(X...)
/*******************************************************************/
const MOD = 1000000000 + 7
const ALPHABET_NUM = 26
const INF_INT64 = math.MaxInt64
const INF_BIT60 = 1 << 60
var xo, yo int
var n int
var X, Y []int
var W []float64
var dp [1 << 13][13]float64
func main() {
    xo, yo = ReadInt(), ReadInt()
    n = ReadInt()
    X, Y = make([]int, n), make([]int, n)
    W = make([]float64, n)
    for i := 0; i < n; i++ {
        x, y, w := ReadInt(), ReadInt(), ReadFloat64()
        X[i], Y[i], W[i] = x, y, w
    }
    for S := 0; S < (1 << uint(n)); S++ {
        for j := 0; j < n; j++ {
            dp[S][j] = float64(INF_BIT60)
        }
    }
    // dp[0][0] = 0.0
    for S := 0; S < (1 << uint(n)); S++ {
        for j := 0; j < n; j++ {
            // 酒屋から最初の配達場所
            if S == 0 {
                dist := AbsInt(X[j]-xo) + AbsInt(Y[j]-yo)
                weight := getWeight(S)
                time := float64(dist) * ((weight + 100.0) / 120.0)
                dp[S|1<<uint(j)][j] = math.Min(dp[S|1<<uint(j)][j], time+W[j])
                continue
            }
            //配達場所k -> 配達場所j
            for k := 0; k < n; k++ {
                if NthBit(S, j) == 0 && NthBit(S, k) == 1 {
                    dist := AbsInt(X[k]-X[j]) + AbsInt(Y[k]-Y[j])
                    weight := getWeight(S)
                    time := float64(dist) * ((weight + 100.0) / 120.0)
                    dp[S|1<<uint(j)][j] = math.Min(dp[S|1<<uint(j)][j], dp[S][k]+time+W[j])
                }
            }
        }
    }
    res := float64(INF_BIT60)
    for k := 0; k < n; k++ {
        res = math.Min(res, dp[1<<uint(n)-1][k]+(100.0/120.0)*float64(AbsInt(X[k]-xo)+AbsInt(Y[k]-yo)))
    }
    fmt.Println(res)
    // for i := 0; i < (1 << uint(n)); i++ {
    //  fmt.Println(dp[i][:n])
    // }
    // fmt.Println(getWeight(1<<uint(n) - 1))
    // fmt.Println(getWeight(0))
}
func getWeight(SS int) float64 {
    res := 0.0
    for j := 0; j < n; j++ {
        if NthBit(SS, j) == 0 {
            res += W[j]
        }
    }
    return res
}
// MODはとったか？
// 遷移だけじゃなくて最後の最後でちゃんと取れよ？
/*******************************************************************/
/*********** I/O ***********/
var (
    // ReadString returns a WORD string.
    ReadString func() string
    stdout     *bufio.Writer
)
func init() {
    ReadString = newReadString(os.Stdin)
    stdout = bufio.NewWriter(os.Stdout)
}
func newReadString(ior io.Reader) func() string {
    r := bufio.NewScanner(ior)
    r.Buffer(make([]byte, 1024), int(1e+11))
    // Split sets the split function for the Scanner. The default split function is ScanLines.
    // Split panics if it is called after scanning has started.
    r.Split(bufio.ScanWords)
    return func() string {
        if !r.Scan() {
            panic("Scan failed")
        }
        return r.Text()
    }
}
// ReadInt returns an integer.
func ReadInt() int {
    return int(readInt64())
}
func readInt64() int64 {
    i, err := strconv.ParseInt(ReadString(), 0, 64)
    if err != nil {
        panic(err.Error())
    }
    return i
}
// ReadIntSlice returns an integer slice that has n integers.
func ReadIntSlice(n int) []int {
    b := make([]int, n)
    for i := 0; i < n; i++ {
        b[i] = ReadInt()
    }
    return b
}
// ReadFloat64 returns an float64.
func ReadFloat64() float64 {
    return float64(readFloat64())
}
func readFloat64() float64 {
    f, err := strconv.ParseFloat(ReadString(), 64)
    if err != nil {
        panic(err.Error())
    }
    return f
}
// ReadFloatSlice returns an float64 slice that has n float64.
func ReadFloat64Slice(n int) []float64 {
    b := make([]float64, n)
    for i := 0; i < n; i++ {
        b[i] = ReadFloat64()
    }
    return b
}
// ReadRuneSlice returns a rune slice.
func ReadRuneSlice() []rune {
    return []rune(ReadString())
}
/*********** Debugging ***********/
// ZeroPaddingRuneSlice returns binary expressions of integer n with zero padding.
// For debugging use.
func ZeroPaddingRuneSlice(n, digitsNum int) []rune {
    sn := fmt.Sprintf("%b", n)
    residualLength := digitsNum - len(sn)
    if residualLength <= 0 {
        return []rune(sn)
    }
    zeros := make([]rune, residualLength)
    for i := 0; i < len(zeros); i++ {
        zeros[i] = '0'
    }
    res := []rune{}
    res = append(res, zeros...)
    res = append(res, []rune(sn)...)
    return res
}
/*********** DP sub-functions ***********/
// ChMin accepts a pointer of integer and a target value.
// If target value is SMALLER than the first argument,
//  then the first argument will be updated by the second argument.
func ChMin(updatedValue *int, target int) bool {
    if *updatedValue > target {
        *updatedValue = target
        return true
    }
    return false
}
// ChMax accepts a pointer of integer and a target value.
// If target value is LARGER than the first argument,
//  then the first argument will be updated by the second argument.
func ChMax(updatedValue *int, target int) bool {
    if *updatedValue < target {
        *updatedValue = target
        return true
    }
    return false
}
// NthBit returns nth bit value of an argument.
// n starts from 0.
func NthBit(num, nth int) int {
    return num >> uint(nth) & 1
}
// OnBit returns the integer that has nth ON bit.
// If an argument has nth ON bit, OnBit returns the argument.
func OnBit(num, nth int) int {
    return num | (1 << uint(nth))
}
// OffBit returns the integer that has nth OFF bit.
// If an argument has nth OFF bit, OffBit returns the argument.
func OffBit(num, nth int) int {
    return num & ^(1 << uint(nth))
}
// PopCount returns the number of ON bit of an argument.
func PopCount(num int) int {
    res := 0
    for i := 0; i < 70; i++ {
        if ((num >> uint(i)) & 1) == 1 {
            res++
        }
    }
    return res
}
/*********** Arithmetic ***********/
// Max returns the max integer among input set.
// This function needs at least 1 argument (no argument causes panic).
func Max(integers ...int) int {
    m := integers[0]
    for i, integer := range integers {
        if i == 0 {
            continue
        }
        if m < integer {
            m = integer
        }
    }
    return m
}
// Min returns the min integer among input set.
// This function needs at least 1 argument (no argument causes panic).
func Min(integers ...int) int {
    m := integers[0]
    for i, integer := range integers {
        if i == 0 {
            continue
        }
        if m > integer {
            m = integer
        }
    }
    return m
}
// DigitSum returns digit sum of a decimal number.
// DigitSum only accept a positive integer.
func DigitSum(n int) int {
    if n < 0 {
        return -1
    }
    res := 0
    for n > 0 {
        res += n % 10
        n /= 10
    }
    return res
}
// Sum returns multiple integers sum.
func Sum(integers ...int) int {
    s := 0
    for _, i := range integers {
        s += i
    }
    return s
}
// CeilInt returns the minimum integer larger than or equal to float(a/b).
func CeilInt(a, b int) int {
    res := a / b
    if a%b > 0 {
        res++
    }
    return res
}
// FloorInt returns the maximum integer smaller than or equal to float(a/b)
func FloorInt(a, b int) int {
    res := a / b
    return res
}
// PowInt is integer version of math.Pow
// PowInt calculate a power by Binary Power (二分累乗法(O(log e))).
func PowInt(a, e int) int {
    if a < 0 || e < 0 {
        panic(errors.New("[argument error]: PowInt does not accept negative integers"))
    }
    if e == 0 {
        return 1
    }
    if e%2 == 0 {
        halfE := e / 2
        half := PowInt(a, halfE)
        return half * half
    }
    return a * PowInt(a, e-1)
}
// AbsInt is integer version of math.Abs
func AbsInt(a int) int {
    if a < 0 {
        return -a
    }
    return a
}
// Gcd returns the Greatest Common Divisor of two natural numbers.
// Gcd only accepts two natural numbers (a, b >= 1).
// 0 or negative number causes panic.
// Gcd uses the Euclidean Algorithm.
func Gcd(a, b int) int {
    if a <= 0 || b <= 0 {
        panic(errors.New("[argument error]: Gcd only accepts two NATURAL numbers"))
    }
    if a < b {
        a, b = b, a
    }
    // Euclidean Algorithm
    for b > 0 {
        div := a % b
        a, b = b, div
    }
    return a
}
// Lcm returns the Least Common Multiple of two natural numbers.
// Lcd only accepts two natural numbers (a, b >= 1).
// 0 or negative number causes panic.
// Lcd uses the Euclidean Algorithm indirectly.
func Lcm(a, b int) int {
    if a <= 0 || b <= 0 {
        panic(errors.New("[argument error]: Gcd only accepts two NATURAL numbers"))
    }
    // a = a'*gcd, b = b'*gcd, a*b = a'*b'*gcd^2
    // a' and b' are relatively prime numbers
    // gcd consists of prime numbers, that are included in a and b
    gcd := Gcd(a, b)
    // not (a * b / gcd), because of reducing a probability of overflow
    return (a / gcd) * b
}
// Strtoi is a wrapper of `strconv.Atoi()`.
// If `strconv.Atoi()` returns an error, Strtoi calls panic.
func Strtoi(s string) int {
    if i, err := strconv.Atoi(s); err != nil {
        panic(errors.New("[argument error]: Strtoi only accepts integer string"))
    } else {
        return i
    }
}
// PrintIntsLine returns integers string delimited by a space.
func PrintIntsLine(A ...int) string {
    res := []rune{}
    for i := 0; i < len(A); i++ {
        str := strconv.Itoa(A[i])
        res = append(res, []rune(str)...)
        if i != len(A)-1 {
            res = append(res, ' ')
        }
    }
    return string(res)
}
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