結果
問題 |
No.3283 Labyrinth and Friends
|
ユーザー |
|
提出日時 | 2025-09-26 22:00:45 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 41 ms / 2,000 ms |
コード長 | 2,102 bytes |
コンパイル時間 | 1,886 ms |
コンパイル使用メモリ | 108,376 KB |
実行使用メモリ | 7,716 KB |
最終ジャッジ日時 | 2025-09-26 22:00:50 |
合計ジャッジ時間 | 3,984 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 45 |
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)); } enum INF = 10L^^18; int N, X; int[] P; long[] C; int[] S; int[][] graph; long[] dfs(int u, const(long[]) fs) { auto gs = new long[X + 1]; gs[] = INF; foreach (x; 0 .. X + 1) { chmin(gs[min(x + S[u], X)], fs[x] + C[u]); } foreach (v; graph[u]) { const res = dfs(v, gs); foreach (x; 0 .. X + 1) chmin(gs[x], res[x]); } return gs; } void main() { try { for (; ; ) { N = readInt; X = readInt; P = new int[N]; foreach (u; 1 .. N) P[u] = readInt - 1; C = new long[N]; S = new int[N]; foreach (u; 1 .. N) { C[u] = readLong; S[u] = readInt; } P[0] = -1; C[0] = 0; S[0] = 0; graph = new int[][N]; foreach (u; 1 .. N) graph[P[u]] ~= u; auto dp = new long[X + 1]; dp[] = INF; dp[0] = 0; dp = dfs(0, dp); writeln(dp[X]); } } catch (EOFException e) { } }