#76265 (Go) No.87 Advent Calendar Problem

• 問題: No.87 Advent Calendar Problem
• ユーザー: yukirin
• 提出日時: 2016-02-14 21:17:24
• 言語: Go (1.22.1)
• 結果: AC
• 実行時間: 2 ms / 5,000 ms
• コード長: 2,583 bytes
• コンパイル時間: 11,869 ms
• コンパイル使用メモリ: 238,060 KB
• 実行使用メモリ: 6,816 KB
• 最終ジャッジ日時: 2024-10-10 22:09:46
• 合計ジャッジ時間: 12,965 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 6,816 KB
testcase_01	AC	1 ms; 5,248 KB
testcase_02	AC	2 ms; 5,248 KB
testcase_03	AC	1 ms; 5,248 KB
testcase_04	AC	1 ms; 5,248 KB
testcase_05	AC	1 ms; 5,248 KB
testcase_06	AC	2 ms; 5,248 KB
testcase_07	AC	1 ms; 5,248 KB
testcase_08	AC	2 ms; 5,248 KB
testcase_09	AC	1 ms; 5,248 KB
testcase_10	AC	1 ms; 5,248 KB
testcase_11	AC	1 ms; 5,248 KB
testcase_12	AC	1 ms; 5,248 KB
testcase_13	AC	1 ms; 5,248 KB
testcase_14	AC	1 ms; 5,248 KB
testcase_15	AC	2 ms; 5,248 KB
testcase_16	AC	1 ms; 5,248 KB
testcase_17	AC	1 ms; 5,248 KB
testcase_18	AC	1 ms; 5,248 KB
testcase_19	AC	1 ms; 5,248 KB
testcase_20	AC	1 ms; 5,248 KB
testcase_21	AC	1 ms; 5,248 KB
testcase_22	AC	1 ms; 5,248 KB
testcase_23	AC	1 ms; 5,248 KB
testcase_24	AC	2 ms; 5,248 KB
testcase_25	AC	1 ms; 5,248 KB
testcase_26	AC	1 ms; 5,248 KB

ソースコード

package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
	"time"
)

var sc = bufio.NewScanner(os.Stdin)
var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func main() {
	sc.Split(bufio.ScanWords)
	n := nextInt() - 2015
	nums := make([]int, 400)
	sum := 0

	for i := range nums {
		t := time.Date(2015+i, time.July, 23, 23, 0, 0, 0, time.UTC)
		if t.Weekday() == time.Wednesday {
			sum++
		}
		nums[i] = sum
	}

	fmt.Println((n/400)*nums[399] + nums[n%400])
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}

func nextInt64() int64 {
	i, _ := strconv.ParseInt(nextLine(), 10, 64)
	return i
}

func nextUint64() uint64 {
	i, _ := strconv.ParseUint(nextLine(), 10, 64)
	return i
}

func nextFloat() float64 {
	f, _ := strconv.ParseFloat(nextLine(), 64)
	return f
}

func readLine() string {
	buf := make([]byte, 0, 1000000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}

func factor(n uint64) []uint64 {
	if n <= 1 {
		return []uint64{n}
	}

	ps := make([]uint64, 0, 100)

	for i := uint64(2); i*i <= n; i++ {
		for n%i == 0 {
			n /= i
			ps = append(ps, i)
		}
	}
	if n > 1 {
		ps = append(ps, n)
	}
	return ps
}

func gcd(a, b uint64) uint64 {
	for ; b != 0; b, a = a%b, b {
	}
	return a
}

func exGcd(x, y int64) (a, b, c int64) {
	if x <= 0 || y <= 0 {
		return
	}

	r0, r1 := x, y
	a0, a1 := int64(1), int64(0)
	b0, b1 := int64(0), int64(1)

	for r1 > 0 {
		q1, r2 := r0/r1, r0%r1
		a2, b2 := a0-q1*a1, b0-q1*b1
		r0, r1 = r1, r2
		a0, a1 = a1, a2
		b0, b1 = b1, b2
	}
	a, b, c = a0, b0, r0
	return
}

func chinese(a1, m1, a2, m2 int64) int64 {
	a, _, c := exGcd(m1, m2)
	if c != 1 {
		return -1
	}

	x := a1 + (a2-a1)*a*m1
	for x < 0 {
		x += m1 * m2
	}
	return x
}

func lcm(a, b uint64) uint64 {
	return (a * b) / gcd(a, b)
}

func round(f float64, place int) float64 {
	shift := math.Pow10(place)
	return math.Floor(f*shift+.5) / shift
}

func round1(f float64) float64 {
	return math.Floor(f + .5)
}

func bitCount(n int64) int64 {
	c := int64(0)
	for i := uint(0); i < 64; i++ {
		if n>>i&1 == 1 {
			c++
		}
	}
	return c
}

type priorityQ []int

func (h priorityQ) Len() int {
	return len(h)
}

func (h priorityQ) Less(i, j int) bool {
	return h[i] < h[j]
}

func (h priorityQ) Swap(i, j int) {
	h[i], h[j] = h[j], h[i]
}

func (h *priorityQ) Push(x interface{}) {
	*h = append(*h, x.(int))
}

func (h *priorityQ) Pop() interface{} {
	x := (*h)[len(*h)-1]
	*h = (*h)[0 : len(*h)-1]
	return x
}