結果
問題 | No.328 きれいな連立方程式 |
ユーザー | 👑 hos.lyric |
提出日時 | 2019-05-29 05:36:46 |
言語 | D (dmd 2.106.1) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 2,017 bytes |
コンパイル時間 | 776 ms |
コンパイル使用メモリ | 118,216 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-22 01:28:15 |
合計ジャッジ時間 | 1,792 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,944 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,944 KB |
testcase_08 | AC | 1 ms
6,944 KB |
testcase_09 | AC | 1 ms
6,944 KB |
testcase_10 | AC | 1 ms
6,944 KB |
testcase_11 | AC | 1 ms
6,940 KB |
testcase_12 | AC | 1 ms
6,944 KB |
testcase_13 | AC | 1 ms
6,944 KB |
testcase_14 | AC | 1 ms
6,940 KB |
testcase_15 | AC | 1 ms
6,940 KB |
testcase_16 | AC | 1 ms
6,944 KB |
testcase_17 | AC | 1 ms
6,940 KB |
testcase_18 | AC | 1 ms
6,940 KB |
testcase_19 | AC | 1 ms
6,940 KB |
testcase_20 | AC | 1 ms
6,944 KB |
testcase_21 | AC | 1 ms
6,944 KB |
testcase_22 | AC | 1 ms
6,944 KB |
testcase_23 | AC | 1 ms
6,944 KB |
testcase_24 | AC | 1 ms
6,940 KB |
testcase_25 | AC | 1 ms
6,940 KB |
testcase_26 | AC | 1 ms
6,940 KB |
testcase_27 | AC | 1 ms
6,940 KB |
testcase_28 | AC | 1 ms
6,940 KB |
testcase_29 | AC | 1 ms
6,940 KB |
testcase_30 | AC | 1 ms
6,944 KB |
ソースコード
/* c1 c3 - c2^2 = (p1 + p2) (p1 z1^2 + p2 z2^2) - (p1 z1 + p2 z2)^2 = p1 p2 z1^2 + p1 p2 z^2 - 2 p1 p2 z1 z2 = p1 p2 (z1 - z2)^2 c1 c4 - c2 c3 = (p1 + p2) (p1 z1^3 + p2 z2^3) - (p1 z1 + p2 z2) (p1 z1^2 + p2 z2^2) = p1 p2 z1^3 + p1 p2 z2^3 - p1 p2 z1^2 z2 - p1 p2 z1 z2^2 = p1 p2 (z1 - z2)^2 (z1 + z2) c2 c4 - c3^2 = (p1 z1 + p2 z2) (p1 z1^3 + p2 z2^3) - (p1 z1^2 + p2 z2^2)^2 = p1 p2 z1^3 z2 + p1 p2 z1 z2^3 - 2 p1 p2 z1^2 z2^2 = p1 p2 (z1 - z2)^2 (z1 z2) */ 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)); } void main() { try { for (; ; ) { const C1 = readLong(); const C2 = readLong(); const C3 = readLong(); const C4 = readLong(); const a = C1 * C3 - C2 * C2; const b = C1 * C4 - C2 * C3; const c = C2 * C4 - C3 * C3; const det = b * b - 4 * a * c; writeln((det >= 0) ? "R" : "I"); } } catch (EOFException e) { } }