結果
| 問題 |
No.265 数学のテスト
|
| コンテスト | |
| ユーザー |
くれちー
|
| 提出日時 | 2017-07-26 14:00:50 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 39 ms / 2,000 ms |
| コード長 | 3,884 bytes |
| コンパイル時間 | 881 ms |
| コンパイル使用メモリ | 115,700 KB |
| 実行使用メモリ | 31,648 KB |
| 最終ジャッジ日時 | 2024-11-24 11:34:58 |
| 合計ジャッジ時間 | 2,845 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 32 |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Console;
using static System.Convert;
using static System.Math;
using static Extentions;
class IO
{
int idx;
string[] input;
public IO(TextReader reader)
{
input = reader.ReadToEnd().Split(new[] { " ", "\n", "\r" },
StringSplitOptions.RemoveEmptyEntries);
}
T Get<T>(Func<string, T> parser) => parser(input[idx++]);
public string S => Get(s => s);
public char C => Get(char.Parse);
public int I => Get(int.Parse);
public long L => Get(long.Parse);
public double F => Get(double.Parse);
public decimal D => Get(decimal.Parse);
public BigInteger B => Get(BigInteger.Parse);
T[] Gets<T>(int n, Func<string, T> parser)
=> input.Skip((idx += n) - n).Take(n).Select(parser).ToArray();
public string[] Ss(int n) => Gets(n, s => s);
public char[] Cs(int n) => Gets(n, char.Parse);
public int[] Is(int n) => Gets(n, int.Parse);
public long[] Ls(int n) => Gets(n, long.Parse);
public double[] Fs(int n) => Gets(n, double.Parse);
public decimal[] Ds(int n) => Gets(n, decimal.Parse);
public BigInteger[] Bs(int n) => Gets(n, BigInteger.Parse);
public void Write<T>(params T[] xs) => WriteLine(string.Join(" ", xs));
public void Write(params object[] xs) => WriteLine(string.Join(" ", xs));
}
static class Extentions
{
}
class Interpreter
{
readonly int d;
public Interpreter(int d) { this.d = d + 1; }
public long[] Interpret(string str)
{
var idx = 0;
return Expr1(str + " ", ref idx);
}
// <expr1> ::= <expr2> [ "+" <expr2> ]*
// <expr2> ::= <expr3> [ "*" <expr3> ]*
// <expr3> ::= <expr4> | "d{" <expr1> "}"
// <expr4> ::= <digit> | "x"
long[] Expr1(string str, ref int idx)
{
var deg = Expr2(str, ref idx);
while (str[idx] == '+')
{
idx++;
deg = Add(deg, Expr2(str, ref idx));
}
return deg;
}
long[] Expr2(string str, ref int idx)
{
var deg = Expr3(str, ref idx);
while (str[idx] == '*')
{
idx++;
deg = Mul(deg, Expr3(str, ref idx));
}
return deg;
}
long[] Expr3(string str, ref int idx)
{
if (str[idx] == 'd')
{
idx += 2;
var deg = Expr1(str, ref idx);
idx += 1;
return D(deg);
}
else return Expr4(str, ref idx);
}
long[] Expr4(string str, ref int idx)
{
var deg = new long[d];
if (str[idx] == 'x')
{
deg[1] = 1;
idx++;
return deg;
}
var val = 0;
while (char.IsDigit(str[idx]))
{
val = val * 10 + (str[idx] - '0');
idx++;
}
deg[0] = val;
return deg;
}
long[] Mul(long[] x, long[] y)
{
var deg = new long[d];
for (var i = 0; i < d; i++)
for (var j = i; j < d; j++) deg[j] += x[i] * y[j - i];
return deg;
}
long[] Add(long[] x, long[] y) => x.Zip(y, (a, b) => a + b).ToArray();
long[] D(long[] x)
{
var deg = new long[d];
for (var i = 1; i < d; i++) deg[i - 1] = x[i] * i;
return deg;
}
}
static class Program
{
public static void Main()
{
var sw = new StreamWriter(OpenStandardOutput()) { NewLine = "\n" };
#if DEBUG
sw.AutoFlush = true;
#else
sw.AutoFlush = false;
#endif
SetOut(sw);
Solve(new IO(In));
Out.Flush();
}
static void Solve(IO io)
{
var n = io.I;
var d = io.I;
var s = io.S;
io.Write(new Interpreter(d).Interpret(s));
}
}
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