結果
| 問題 |
No.584 赤、緑、青の色塗り
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-01-29 08:30:04 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,657 bytes |
| コンパイル時間 | 940 ms |
| コンパイル使用メモリ | 119,552 KB |
| 実行使用メモリ | 7,000 KB |
| 最終ジャッジ日時 | 2024-06-13 03:49:04 |
| 合計ジャッジ時間 | 3,761 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 6 |
| other | AC * 13 WA * 1 |
ソースコード
import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, 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 MO = 1000000007L;
enum LIM = 10^^5;
long[] inv, fac, invFac, two;
void prepare() {
inv = new long[LIM];
fac = new long[LIM];
invFac = new long[LIM];
inv[1] = 1;
foreach (i; 2 .. LIM) {
inv[i] = MO - ((MO / i) * inv[cast(size_t)(MO % i)]) % MO;
}
fac[0] = invFac[0] = 1;
foreach (i; 1 .. LIM) {
fac[i] = (fac[i - 1] * i) % MO;
invFac[i] = (invFac[i - 1] * inv[i]) % MO;
}
two = new long[LIM];
two[0] = 1;
foreach (i; 1 .. LIM) {
two[i] = (two[i - 1] * 2) % MO;
}
}
int N, A, B, C;
void main() {
prepare();
try {
for (; ; ) {
N = readInt();
A = readInt();
B = readInt();
C = readInt();
long ans;
if (A + B + C <= (2 * N + 2) / 3) {
const white = N - (A + B + C);
debug {
writeln("white = ", white);
}
/*
b + c <= A
c + a <= B
a + b <= C
((A + B + C) - (a + b + c)) blocks
2^(a + b + c)
(A + B + C)! / (a! b! c! (A - b - c)! (B - c - a)! (C - a - b)!)
*/
long calc(int x) {
if (x >= 1 && white >= x - 1) {
const n = x + 1;
const k = white - (x - 1);
long ret = 1;
(ret *= fac[n + k - 1]) %= MO;
(ret *= invFac[k]) %= MO;
(ret *= invFac[n - 1]) %= MO;
return ret;
} else {
return 0;
}
}
debug {
foreach (x; 0 .. 10) {
writeln("calc ", x, " = ", calc(x));
}
}
foreach (x; 0 .. N + 1) {
const res = calc(x);
if (res != 0) {
// a + b + c = (A + B + C) - x
foreach (b; 0 .. min(A, C, (A + B + C) - x) + 1) {
foreach (c; 0 .. min(A - b, B, (A + B + C) - x) + 1) {
const a = (A + B + C) - x - b - c;
if (0 <= a && c + a <= B && a + b <= C) {
long prod = res;
(prod *= two[a + b + c]) %= MO;
(prod *= fac[x]) %= MO;
(prod *= invFac[a]) %= MO;
(prod *= invFac[b]) %= MO;
(prod *= invFac[c]) %= MO;
(prod *= invFac[A - b - c]) %= MO;
(prod *= invFac[B - c - a]) %= MO;
(prod *= invFac[C - a - b]) %= MO;
(ans += prod) %= MO;
}
}
}
}
}
}
writeln(ans);
}
} catch (EOFException e) {
}
}