結果
問題 | No.599 回文かい |
ユーザー |
👑 |
提出日時 | 2019-05-22 01:04:11 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 225 ms / 4,000 ms |
コード長 | 2,569 bytes |
コンパイル時間 | 667 ms |
コンパイル使用メモリ | 121,668 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-22 01:17:31 |
合計ジャッジ時間 | 2,465 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 |
---|---|
other | AC * 22 |
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.complex, std.container, std.math, 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)); }int[] getZ(T)(T a) {const n = cast(int)(a.length);auto z = new int[n + 1];int j = 0;foreach (i; 1 .. n) {if (i + z[i - j] < j + z[j]) {z[i] = z[i - j];} else {int k = max(j + z[j] - i, 0);for (; i + k < n && a[k] == a[i + k]; ++k) {}z[i] = k;j = i;}}z[0] = n;return z;}unittest {foreach (n; 0 .. 10) {foreach (x; 0 .. 3^^n) {auto a = iota(n).map!(i => x / 3^^i % 3);auto z = getZ(a);foreach (i; 0 .. n + 1) {assert(i + z[i] <= n);foreach (k; 0 .. z[i]) {assert(a[k] == a[i + k]);}assert(i + z[i] == n || a[z[i]] != a[i + z[i]]);}}}}enum MO = 10L^^9 + 7;long solve(in string s) {const n = cast(int)(s.length);auto dp = new long[n + 1];foreach_reverse (i; 0 .. n + 1) {if (i <= n - i) {const z = getZ(s[i .. n - i]);debug {writeln("i = ", i);writeln(" s = ", s[i .. n - i]);writeln(" z = ", z);}dp[i] = 1;foreach (k; 1 .. (n - i - i) / 2 + 1) {if (z[n - i - i - k] == k) {dp[i] += dp[i + k];if (dp[i] >= MO) {dp[i] -= MO;}}}}}return dp[0];}void main() {try {for (; ; ) {const S = readToken();const ans = solve(S);writeln(ans);}} catch (EOFException e) {}}