結果
| 問題 |
No.488 四角関係
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-03-25 18:43:38 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 146 ms / 5,000 ms |
| コード長 | 2,691 bytes |
| コンパイル時間 | 2,125 ms |
| コンパイル使用メモリ | 78,084 KB |
| 実行使用メモリ | 40,228 KB |
| 最終ジャッジ日時 | 2024-07-06 06:06:29 |
| 合計ジャッジ時間 | 5,172 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 22 |
ソースコード
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
/**
* Built using CHelper plug-in
* Actual solution is at the top
*
* @author Chiaki.Hoshinomori
*/
public class Main {
public static void main(String[] args) {
InputStream inputStream = System.in;
OutputStream outputStream = System.out;
InputReader in = new InputReader(inputStream);
PrintWriter out = new PrintWriter(outputStream);
Task488 solver = new Task488();
solver.solve(1, in, out);
out.close();
}
static class Task488 {
public void solve(int testNumber, InputReader in, PrintWriter out) {
int n = in.nextInt();
int m = in.nextInt();
boolean[][] g = new boolean[n][];
for (int i = 0; i < n; i++) {
g[i] = new boolean[n];
}
for (int i = 0; i < m; i++) {
int a = in.nextInt();
int b = in.nextInt();
g[a][b] = g[b][a] = true;
}
int ret = 0;
for (int a = 0; a < n; a++) {
for (int b = 0; b < n; b++) {
if (a == b) continue;
;
for (int c = 0; c < n; c++) {
if (a == c || b == c) continue;
for (int d = 0; d < n; d++) {
if (a == d || b == d || c == d) continue;
if (g[a][b] && g[b][c] && g[c][d] && g[d][a] && !g[a][c] && !g[b][d]) {
++ret;
}
}
}
}
}
out.println(ret / 8);
}
}
static class InputReader {
public BufferedReader reader;
public StringTokenizer tokenizer;
public InputReader(InputStream stream) {
reader = new BufferedReader(new InputStreamReader(stream), 32768);
tokenizer = null;
}
public String next() {
while (tokenizer == null || !tokenizer.hasMoreTokens()) {
try {
tokenizer = new StringTokenizer(reader.readLine());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return tokenizer.nextToken();
}
public int nextInt() {
return Integer.parseInt(next());
}
}
}