結果
問題 | No.583 鉄道同好会 |
ユーザー | hiromi_ayase |
提出日時 | 2017-10-27 22:40:56 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,998 bytes |
コンパイル時間 | 3,811 ms |
コンパイル使用メモリ | 83,012 KB |
実行使用メモリ | 46,848 KB |
最終ジャッジ日時 | 2024-11-21 22:34:19 |
合計ジャッジ時間 | 5,925 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | WA | - |
testcase_01 | AC | 73 ms
37,908 KB |
testcase_02 | AC | 74 ms
38,272 KB |
testcase_03 | AC | 73 ms
38,172 KB |
testcase_04 | AC | 73 ms
38,200 KB |
testcase_05 | AC | 74 ms
38,364 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | AC | 74 ms
38,436 KB |
testcase_09 | AC | 80 ms
37,956 KB |
testcase_10 | AC | 90 ms
38,440 KB |
testcase_11 | AC | 182 ms
45,688 KB |
testcase_12 | AC | 200 ms
46,736 KB |
testcase_13 | AC | 200 ms
46,848 KB |
testcase_14 | AC | 200 ms
45,940 KB |
testcase_15 | AC | 221 ms
46,704 KB |
testcase_16 | AC | 269 ms
46,800 KB |
testcase_17 | AC | 296 ms
46,672 KB |
testcase_18 | WA | - |
ソースコード
public class Main { private static void solve() { int n = ni(); int m = ni(); int[] rank = new int[n]; UnionFind uf = new UnionFind(n); for (int i = 0; i < m; i ++) { int a = ni(); int b = ni(); rank[a] ++; rank[b] ++; uf.union(a, b); } int[] count = new int[2]; for (int v : rank) { count[v % 2] ++; } int root = uf.find(0); for (int i = 0; i < n; i ++) { if (root != uf.find(i)) { System.out.println("NO"); return; } } if (count[1] == 0 || count[1] == 2) { System.out.println("YES"); } else { System.out.println("NO"); } } static class UnionFind { private int[] table; private int[] rank; public UnionFind(int size) { this.table = new int[size]; this.rank = new int[size]; for (int i = 0; i < size; i ++) { this.table[i] = i; this.rank[i] = 1; } } public boolean isSame(int node1, int node2) { return find(node1) == find(node2); } public int find(int node) { if (table[node] == node) { return node; } else { return table[node] = find(table[node]); } } public void union(int node1, int node2) { int root1 = find(node1); int root2 = find(node2); if (rank[root1] < rank[root2]) { table[root1] = root2; } else if (rank[root1] > rank[root2]) { table[root2] = root1; } else if (root1 != root2) { table[root2] = root1; rank[root1] ++; } } } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { long start = System.currentTimeMillis(); String debug = args.length > 0 ? args[0] : null; if (debug != null) { try { is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug)); } catch (Exception e) { throw new RuntimeException(e); } } reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768); solve(); out.flush(); tr((System.currentTimeMillis() - start) + "ms"); } }, "", 64000000).start(); } private static java.io.InputStream is = System.in; private static java.io.PrintWriter out = new java.io.PrintWriter(System.out); private static java.util.StringTokenizer tokenizer = null; private static java.io.BufferedReader reader; public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } private static void tr(Object... o) { if (is != System.in) System.out.println(java.util.Arrays.deepToString(o)); } }