結果
問題 | No.1024 Children in a Row |
ユーザー |
👑 |
提出日時 | 2020-04-11 02:11:17 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 443 ms / 2,000 ms |
コード長 | 3,371 bytes |
コンパイル時間 | 1,035 ms |
コンパイル使用メモリ | 126,108 KB |
実行使用メモリ | 51,712 KB |
最終ジャッジ日時 | 2024-06-22 06:38:59 |
合計ジャッジ時間 | 13,100 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 27 |
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; }real readReal() { return readToken.to!real; }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();auto A = new int[M];auto B = new int[M];auto K = new int[M];foreach (i; 0 .. M) {A[i] = readInt() - 1;B[i] = readInt() - 1;K[i] = readInt() - 1;}auto heads = iota(N).array;auto befs = new int[N + M];befs[] = -1;auto graph = new int[][N + M];foreach (i; 0 .. M) {befs[N + i] = heads[A[i]];heads[A[i]] = N + i;graph[heads[B[i]]] ~= N + i;}auto on = new bool[N + M];foreach (j; 0 .. N) {on[heads[j]] = true;}auto dis = new int[N + M];auto fin = new int[N + M];int[] us;void dfs(int u) {dis[u] = cast(int)(us.length);if (on[u]) {us ~= u;}foreach_reverse (v; graph[u]) {dfs(v);}fin[u] = cast(int)(us.length);}foreach (j; 0 .. N) {dfs(j);}debug {writeln("us = ", us);}assert(us.length == N);foreach (i; 0 .. M) {const a = dis[N + i];const b = fin[N + i];const c = dis[befs[N + i]];debug {writefln("cut [%s, %s) and insert at %s", a, b, c);}alias Slice = Tuple!(int, "l", int, "r");Slice[] slices;if (c <= a) {slices ~= Slice(0, c);slices ~= Slice(a, b);slices ~= Slice(c, a);slices ~= Slice(b, N);} else if (b <= c) {slices ~= Slice(0, a);slices ~= Slice(b, c);slices ~= Slice(a, b);slices ~= Slice(c, N);} else {assert(false);}int ans = -1;int k = K[i];foreach (ref slice; slices) {const len = slice.r - slice.l;if (k < len) {const u = us[slice.l + k];ans = (u < N) ? u : A[u - N];break;} else {k -= len;}}assert(ans != -1);writeln(ans + 1);}}} catch (EOFException e) {}}