結果
問題 | No.2276 I Want AC |
ユーザー | 👑 hos.lyric |
提出日時 | 2023-04-21 22:38:10 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 28 ms / 2,000 ms |
コード長 | 2,351 bytes |
コンパイル時間 | 857 ms |
コンパイル使用メモリ | 119,172 KB |
実行使用メモリ | 14,292 KB |
最終ジャッジ日時 | 2024-06-22 17:46:57 |
合計ジャッジ時間 | 3,359 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 56 |
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; } 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 S = readToken; auto sumA = new int[N + 1]; auto sumC = new int[N + 1]; foreach (i; 0 .. N) { sumA[i + 1] = sumA[i] + ((S[i] == 'A') ? 1 : 0); sumC[i + 1] = sumC[i] + ((S[i] == 'C') ? 1 : 0); } long base; foreach (i; 0 .. N) if (S[i] == 'C') { base += sumA[i]; } long[] fs, gs; foreach (i; 0 .. N) if (S[i] == '?') { fs ~= (sumC[N] - sumC[i]); gs ~= sumA[i]; } const len = cast(int)(fs.length); auto head = new long[len + 1]; auto tail = new long[len + 1]; foreach (j; 0 .. len) head[j + 1] = head[j] + fs[j]; foreach_reverse (j; 0 .. len) tail[j] = gs[j] + tail[j + 1]; debug { writeln("fs = ", fs); writeln("gs = ", gs); writeln("head = ", head); writeln("tail = ", tail); } long ans; foreach (j; 0 .. len + 1) { const score = base + head[j] + tail[j] + 1L * j * (len - j); debug { writeln(j, ": ", score); } chmax(ans, score); } writeln(ans); } } catch (EOFException e) { } }