結果

問題 No.330 Eigenvalue Decomposition
ユーザー Grenache
提出日時 2015-12-25 19:54:17
言語 Java
(openjdk 23)
結果
AC  
実行時間 578 ms / 5,000 ms
コード長 2,664 bytes
コンパイル時間 3,827 ms
コンパイル使用メモリ 78,536 KB
実行使用メモリ 60,960 KB
最終ジャッジ日時 2024-09-18 23:59:31
合計ジャッジ時間 12,096 ms
ジャッジサーバーID
(参考情報)
judge5 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 5
other AC * 31
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.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Iterator;
public class Main_yukicoder330 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Printer pr = new Printer(System.out);
int n = sc.nextInt();
int m = sc.nextInt();
UnionFind uf = new UnionFind(n);
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
@SuppressWarnings("unused")
int c = sc.nextInt();
uf.union(a, b);
}
pr.println(uf.count());
pr.close();
sc.close();
}
@SuppressWarnings("unused")
private static class UnionFind {
int[] parent;
int[] rank;
UnionFind(int n) {
parent = new int[n];
rank = new int[n];
for (int i = 0; i < n; i++) {
parent[i] = i;
rank[i] = 0;
}
}
int find(int x) {
if (parent[x] == x) {
return x;
} else {
return parent[x] = find(parent[x]);
}
}
boolean same(int x, int y) {
return find(x) == find(y);
}
void union(int x, int y) {
x = find(x);
y = find(y);
if (x != y) {
if (rank[x] > rank[y]) {
parent[y] = x;
} else {
parent[x] = y;
if (rank[x] == rank[y]) {
rank[y]++;
}
}
}
return;
}
//
int count() {
int ret = 0;
for (int i = 0; i < parent.length; i++) {
if (find(i) == i) {
ret++;
}
}
return ret;
}
}
@SuppressWarnings("unused")
private static class Scanner {
BufferedReader br;
Iterator<String> it;
Scanner (InputStream in) {
br = new BufferedReader(new InputStreamReader(in));
}
String next() throws RuntimeException {
try {
if (it == null || !it.hasNext()) {
it = Arrays.asList(br.readLine().split(" ")).iterator();
}
return it.next();
} catch (IOException e) {
throw new IllegalStateException();
}
}
int nextInt() throws RuntimeException {
return Integer.parseInt(next());
}
long nextLong() throws RuntimeException {
return Long.parseLong(next());
}
float nextFloat() throws RuntimeException {
return Float.parseFloat(next());
}
double nextDouble() throws RuntimeException {
return Double.parseDouble(next());
}
void close() {
try {
br.close();
} catch (IOException e) {
// throw new IllegalStateException();
}
}
}
private static class Printer extends PrintWriter {
Printer(PrintStream out) {
super(out);
}
}
}
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