結果

問題 No.488 四角関係
ユーザー Grenache
提出日時 2017-02-24 22:44:56
言語 Java
(openjdk 23)
結果
AC  
実行時間 105 ms / 5,000 ms
コード長 4,835 bytes
コンパイル時間 4,192 ms
コンパイル使用メモリ 80,792 KB
実行使用メモリ 53,428 KB
最終ジャッジ日時 2025-01-02 23:17:29
合計ジャッジ時間 6,216 ms
ジャッジサーバーID
(参考情報)
judge2 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 22
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

import java.io.*;
import java.util.*;
public class Main_yukicoder488 {
private static Scanner sc;
private static Printer pr;
private static void solve() {
int n = sc.nextInt();
int m = sc.nextInt();
int[] a = new int[m];
int[] b = new int[m];
boolean[][] edges = new boolean[n][n];
for (int i = 0; i < m; i++) {
a[i] = sc.nextInt();
b[i] = sc.nextInt();
edges[a[i]][b[i]] = true;
edges[b[i]][a[i]] = true;
}
int ret = 0;
for (int i1 = 0; i1 < n; i1++) {
for (int i2 = i1 + 1; i2 < n; i2++) {
for (int i3 = i2 + 1; i3 < n; i3++) {
for (int i4 = i3 + 1; i4 < n; i4++) {
if (edges[i1][i2] && edges[i2][i3] && edges[i3][i4] && edges[i4][i1]) {
if (!edges[i1][i3] && !edges[i2][i4]) {
ret++;
}
}
if (edges[i1][i3] && edges[i3][i2] && edges[i2][i4] && edges[i4][i1]) {
if (!edges[i1][i2] && !edges[i3][i4]) {
ret++;
}
}
if (edges[i1][i2] && edges[i2][i4] && edges[i4][i3] && edges[i3][i1]) {
if (!edges[i1][i4] && !edges[i2][i3]) {
ret++;
}
}
}
}
}
}
pr.println(ret);
}
// ---------------------------------------------------
public static void main(String[] args) {
sc = new Scanner(System.in);
pr = new Printer(System.out);
solve();
pr.close();
sc.close();
}
@SuppressWarnings("unused")
private static class Scanner {
BufferedReader br;
Scanner (InputStream in) {
br = new BufferedReader(new InputStreamReader(in));
}
private boolean isPrintable(int ch) {
return ch >= '!' && ch <= '~';
}
private boolean isCRLF(int ch) {
return ch == '\n' || ch == '\r' || ch == -1;
}
private int nextPrintable() {
try {
int ch;
while (!isPrintable(ch = br.read())) {
if (ch == -1) {
throw new NoSuchElementException();
}
}
return ch;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
String next() {
try {
int ch = nextPrintable();
StringBuilder sb = new StringBuilder();
do {
sb.appendCodePoint(ch);
} while (isPrintable(ch = br.read()));
return sb.toString();
} catch (IOException e) {
throw new NoSuchElementException();
}
}
int nextInt() {
try {
// parseInt from Integer.parseInt()
boolean negative = false;
int res = 0;
int limit = -Integer.MAX_VALUE;
int radix = 10;
int fc = nextPrintable();
if (fc < '0') {
if (fc == '-') {
negative = true;
limit = Integer.MIN_VALUE;
} else if (fc != '+') {
throw new NumberFormatException();
}
fc = br.read();
}
int multmin = limit / radix;
int ch = fc;
do {
int digit = ch - '0';
if (digit < 0 || digit >= radix) {
throw new NumberFormatException();
}
if (res < multmin) {
throw new NumberFormatException();
}
res *= radix;
if (res < limit + digit) {
throw new NumberFormatException();
}
res -= digit;
} while (isPrintable(ch = br.read()));
return negative ? res : -res;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
long nextLong() {
try {
// parseLong from Long.parseLong()
boolean negative = false;
long res = 0;
long limit = -Long.MAX_VALUE;
int radix = 10;
int fc = nextPrintable();
if (fc < '0') {
if (fc == '-') {
negative = true;
limit = Long.MIN_VALUE;
} else if (fc != '+') {
throw new NumberFormatException();
}
fc = br.read();
}
long multmin = limit / radix;
int ch = fc;
do {
int digit = ch - '0';
if (digit < 0 || digit >= radix) {
throw new NumberFormatException();
}
if (res < multmin) {
throw new NumberFormatException();
}
res *= radix;
if (res < limit + digit) {
throw new NumberFormatException();
}
res -= digit;
} while (isPrintable(ch = br.read()));
return negative ? res : -res;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
float nextFloat() {
return Float.parseFloat(next());
}
double nextDouble() {
return Double.parseDouble(next());
}
String nextLine() {
try {
int ch;
while (isCRLF(ch = br.read())) {
if (ch == -1) {
throw new NoSuchElementException();
}
}
StringBuilder sb = new StringBuilder();
do {
sb.appendCodePoint(ch);
} while (!isCRLF(ch = br.read()));
return sb.toString();
} catch (IOException e) {
throw new NoSuchElementException();
}
}
void close() {
try {
br.close();
} catch (IOException e) {
// throw new NoSuchElementException();
}
}
}
private static class Printer extends PrintWriter {
Printer(PrintStream out) {
super(out);
}
}
}
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