結果
問題 |
No.3291 K-step Navigation
|
ユーザー |
|
提出日時 | 2025-10-03 22:19:56 |
言語 | D (dmd 2.109.1) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,651 bytes |
コンパイル時間 | 740 ms |
コンパイル使用メモリ | 108,044 KB |
実行使用メモリ | 7,720 KB |
最終ジャッジ日時 | 2025-10-03 22:20:09 |
合計ジャッジ時間 | 11,282 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 33 WA * 17 |
ソースコード
import std.conv, std.functional, std.range, std.stdio, std.string; import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons; import core.bitop; class EOFException : Throwable { this() { super("EOF"); } } string[] tokens; string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; } int readInt() { return readToken.to!int; } long readLong() { return readToken.to!long; } string COLOR(string s = "") { return "\x1b[" ~ s ~ "m"; } bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } } bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } } int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; } int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); } int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); } void main() { try { for (; ; ) { const N = readInt; const M = readInt; const K = readLong; const S = readInt - 1; const T = readInt - 1; auto A = new int[M]; auto B = new int[M]; foreach (i; 0 .. M) { A[i] = readInt - 1; B[i] = readInt - 1; } auto graph = new int[][N]; foreach (i; 0 .. M) { graph[A[i]] ~= B[i]; graph[B[i]] ~= A[i]; } // min odd cycle int odd = -1; foreach (r; 0 .. N) { DList!int que; auto dist = new int[N << 1]; dist[] = -1; dist[r << 1] = 0; que.insertBack(r << 1); for (; !que.empty; ) { const u = que.front >> 1; const s = que.front & 1; que.removeFront; foreach (v; graph[u]) { const t = s ^ 1; if (!~dist[v << 1 | t]) { dist[v << 1 | t] = dist[u << 1 | s] + 1; que.insertBack(v << 1 | t); } } } const d = dist[r << 1 | 1]; if (~d) { if (!~odd || odd > d) odd = d; } } debug writeln("odd = ", odd); bool ans; if (K & 1) { ans = true; } else { ans = ans || graph[S].length; ans = ans || graph[T].length; ans = ans || (~odd && 3 + odd <= K); } writeln(ans ? "Yes" : "No"); } } catch (EOFException e) { } }