#512361 (Go) No.488 四角関係

• 問題: No.488 四角関係
• ユーザー: ccppjsrb
• 提出日時: 2020-07-17 00:37:50
• 言語: Go (1.22.1)
• 結果: AC
• 実行時間: 92 ms / 5,000 ms
• コード長: 2,158 bytes
• コンパイル時間: 16,033 ms
• コンパイル使用メモリ: 228,976 KB
• 実行使用メモリ: 5,248 KB
• 最終ジャッジ日時: 2024-11-26 02:44:10
• 合計ジャッジ時間: 17,710 ms
• ジャッジサーバーID （参考情報）: judge3 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	42 ms; 5,248 KB
testcase_01	AC	28 ms; 5,248 KB
testcase_02	AC	40 ms; 5,248 KB
testcase_03	AC	14 ms; 5,248 KB
testcase_04	AC	21 ms; 5,248 KB
testcase_05	AC	50 ms; 5,248 KB
testcase_06	AC	89 ms; 5,248 KB
testcase_07	AC	92 ms; 5,248 KB
testcase_08	AC	86 ms; 5,248 KB
testcase_09	AC	1 ms; 5,248 KB
testcase_10	AC	10 ms; 5,248 KB
testcase_11	AC	2 ms; 5,248 KB
testcase_12	AC	5 ms; 5,248 KB
testcase_13	AC	8 ms; 5,248 KB
testcase_14	AC	2 ms; 5,248 KB
testcase_15	AC	1 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	2 ms; 5,248 KB
testcase_20	AC	2 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

ソースコード

package main

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

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	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 getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	m := getNextInt(scanner)
	ee := makeGrid(n, n)
	for i := 0; i < m; i++ {
		a := getNextInt(scanner)
		b := getNextInt(scanner)
		ee[a][b] = 1
		ee[b][a] = 1
	}

	var ans int
	for i := 0; i < n; i++ {
		for j := 0; j < i; j++ {
			for k := 0; k < j; k++ {
				for l := 0; l < k; l++ {
					if square(i, j, k, l, ee) {
						ans++
					}
				}
			}
		}
	}
	fmt.Fprintln(writer, ans)
}
func square(i, j, k, l int, ee [][]int) bool {
	m := map[int]int{}
	m[i] += ee[i][j]
	m[i] += ee[i][k]
	m[i] += ee[i][l]
	m[j] += ee[j][i]
	m[j] += ee[j][k]
	m[j] += ee[j][l]
	m[k] += ee[k][j]
	m[k] += ee[k][i]
	m[k] += ee[k][l]
	m[l] += ee[l][j]
	m[l] += ee[l][k]
	m[l] += ee[l][i]
	for _, c := range m {
		if c != 2 {
			return false
		}
	}
	return true
}
func makeGrid(h, w int) [][]int {
	index := make([][]int, h, h)
	data := make([]int, h*w, h*w)
	for i := 0; i < h; i++ {
		index[i] = data[i*w : (i+1)*w]
	}
	return index
}