結果
問題 | No.1203 お菓子ゲーム |
ユーザー |
👑 |
提出日時 | 2020-08-28 22:13:29 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 791 ms / 2,000 ms |
コード長 | 3,767 bytes |
コンパイル時間 | 764 ms |
コンパイル使用メモリ | 119,320 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-22 08:26:43 |
合計ジャッジ時間 | 26,103 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 51 |
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)); }enum L = 10L^^8;long calc(const(long) X, const(long) Y) {long ret;/*0 < j < i <= Lj = 2 kX / Y = k / i*/if (Y > 2 * X) {ret += L / Y;}/*0 < j < i <= Lj = 2 k + 1X / Y = (2 k (k + 1)) / (i (2 k + 1))X > 0 ==> k > 0*/void check(long d) {if (d >= 3 && d % 2 != 0) {const k = (d - 1) / 2;if ((2 * k * (k + 1)) % X == 0) {const q = (2 * k * (k + 1)) / X;if (Y / d <= L / q) {const i = (Y / d) * q;debug {writefln("X/Y = %s/%s, d = %s, k = %s, i = %s", X, Y, d, k, i);}if (2 * k + 1 < i && i <= L) {++ret;}}}}}for (long d = 1; d^^2 <= Y; ++d) {if (Y % d == 0) {check(d);if (d != Y / d) {check(Y / d);}}}return ret;}void main() {debug {enum lim = 10;auto dp = new real[][](lim, lim);foreach (i; 0 .. lim) foreach (j; 0 .. lim) {if (i != j) {dp[i][j] = 0.0L;if (i > 0 && j > 0) {if (i > j) {dp[i][j] += (1.0L * (j - 1) / i) * dp[j - 1][j];} else {dp[i][j] += (1.0L * (i - 1) / j) * dp[i][i - 1];dp[i][j] += (1.0L * (j - (i - 1)) / j);}}}}foreach (i; 0 .. lim) {writeln(i, ": ", dp[i]);foreach (j; 1 .. i) {real prob = 1.0L * (j^^2 / 2) / (i * j);assert(abs(prob - dp[i][j]) <= 1e-12L);}if (i > 0) {foreach (j; i + 1 .. lim) {real prob = 1.0L - 1.0L * (i^^2 / 2) / (j * i);assert(abs(prob - dp[i][j]) <= 1e-12L);}}}}try {for (; ; ) {const numCases = readInt();foreach (caseId; 0 .. numCases) {const X = readLong();const Y = readLong();long ans;ans += calc(X, Y);ans += calc(Y - X, Y);writeln(ans);debug {foreach (i; 1 .. 100) {foreach (j; 1 .. i) {if (j % 2 != 0) {long p = j^^2 / 2;long q = i * j;const g = gcd(p, q);p /= g;q /= g;if (p == X && q == Y) {writeln("brt X/Y " , i, " ", j);}if (p == Y - X && q == Y) {writeln("brt 1-X/Y " , i, " ", j);}}}}}}}} catch (EOFException e) {}}