結果
| 問題 |
No.265 数学のテスト
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-04-06 18:06:14 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 303 ms / 2,000 ms |
| コード長 | 2,765 bytes |
| コンパイル時間 | 7,691 ms |
| コンパイル使用メモリ | 323,200 KB |
| 実行使用メモリ | 11,264 KB |
| 最終ジャッジ日時 | 2024-06-13 04:52:55 |
| 合計ジャッジ時間 | 10,990 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 32 |
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)); }
int N;
int D;
string S;
BigInt[] add(in BigInt[] a, in BigInt[] b) {
BigInt[] c = new BigInt[D + 1];
foreach (i; 0 .. D + 1) {
c[i] = a[i] + b[i];
}
return c;
}
BigInt[] mul(in BigInt[] a, in BigInt[] b) {
BigInt[] c = new BigInt[D + 1];
foreach (i; 0 .. D + 1) foreach (j; 0 .. D - i + 1) {
c[i + j] += a[i] * b[j];
}
return c;
}
BigInt[] dif(in BigInt[] a) {
BigInt[] b = new BigInt[D + 1];
foreach (i; 1 .. D + 1) {
b[i - 1] = i * a[i];
}
return b;
}
int cur;
BigInt[] expr() {
BigInt[] ret = term();
for (; S[cur] == '+'; ) {
++cur;
const tmp = term();
ret = add(ret, tmp);
}
debug {
writeln("expr ", ret);
}
return ret;
}
BigInt[] term() {
BigInt[] ret = factor();
for (; S[cur] == '*'; ) {
++cur;
const tmp = factor();
ret = mul(ret, tmp);
}
debug {
writeln("term ", ret);
}
return ret;
}
BigInt[] factor() {
BigInt[] ret;
if (S[cur] == 'd') {
++cur;
assert(S[cur] == '{');
++cur;
const tmp = expr();
ret = dif(tmp);
assert(S[cur] == '}');
++cur;
} else if (S[cur] == 'x') {
++cur;
ret = new BigInt[D + 1];
ret[1] = 1;
} else if ('0' <= S[cur] && S[cur] <= '9') {
ret = new BigInt[D + 1];
ret[0] = S[cur++] - '0';
} else {
assert(false);
}
debug {
writeln("factor ", ret);
}
return ret;
}
void main() {
try {
for (; ; ) {
N = readInt();
D = readInt();
S = readToken();
S ~= '$';
cur = 0;
const ans = expr();
writeln(ans.to!string.replaceAll(regex(`[\[\],]`), ""));
}
} catch (EOFException e) {
}
}