結果

問題 No.491 10^9+1と回文
ユーザー fairy_lettucefairy_lettuce
提出日時 2020-10-14 12:29:04
言語 C#(csc)
(csc 3.9.0)
結果
WA  
実行時間 -
コード長 9,447 bytes
コンパイル時間 1,137 ms
コンパイル使用メモリ 116,412 KB
実行使用メモリ 28,300 KB
最終ジャッジ日時 2024-07-20 19:04:07
合計ジャッジ時間 5,447 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 78 WA * 23 RE * 2
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Diagnostics;
using System.Runtime.CompilerServices;
namespace FertiLib.Contest.A
{
static class Program
{
public static void Solve(Scanner cin)
{
long n = cin.ReadLong();
var m = n / 1000000000L;
if (m > n % 1000000000L) m--;
var len = m.ToString().Length;
long ans = 0;
for (int i = 0; i < len; i++)
{
ans += GetAns(m, i + 1);
}
Console.WriteLine(ans);
}
public static long GetAns(long n, long keta)
{
if (n.ToString().Length > keta)
{
n = 1;
for (int i = 0; i < keta; i++)
{
n *= 10;
}
n--;
}
var s = n.ToString().ToCharArray();
var dp = new long[(keta + 1) / 2, 10, 2];
long mask = 1L;
for (int i = 0; i < keta; i++)
{
mask *= 10;
}
if(s.Length % 2 == 0)
{
long halfmask = 1L;
for (int i = 0; i < keta / 2; i++)
{
halfmask *= 10;
}
if (n % halfmask < n / halfmask) s[(int)keta / 2 - 1]--;
}
for (int i = 0; i < (keta + 1) / 2; i++)
{
long t = 0;
if (i > 0)
{
for (int j = 0; j < 10; j++)
{
t += dp[i - 1, j, 1];
}
}
else
{
dp[i, 0, 1]--;
}
for (int j = 0; j < 10; j++)
{
dp[i, j, 1] += t;
}
for (int j = 0; j < s[i] - '0'; j++)
{
dp[i, j, 1]++;
}
dp[i, s[i] - '0', 0] += 1;
}
var ret = 0L;
for (int i = 0; i < 10; i++)
{
ret += dp[(keta + 1) / 2 - 1, i, 0];
ret += dp[(keta + 1) / 2 - 1, i, 1];
}
return ret;
}
public static void Main(string[] args)
{
var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
Console.SetOut(sw);
var cin = new Scanner();
Solve(cin);
Console.Out.Flush();
}
public static void YESNO(bool condition) => Console.WriteLine(condition ? "YES" : "NO");
public static void YesNo(bool condition) => Console.WriteLine(condition ? "Yes" : "No");
public static void yesno(bool condition) => Console.WriteLine(condition ? "yes" : "no");
public static bool Chmax<T>(ref T a, T b) where T : IComparable<T>
{
if (a.CompareTo(b) >= 0) return false;
a = b;
return true;
}
public static bool Chmin<T>(ref T a, T b) where T : IComparable<T>
{
if (a.CompareTo(b) <= 0) return false;
a = b;
return true;
}
}
static class Extention
{
public static string Join<T>(this IEnumerable<T> x, string separator = "") => string.Join(separator, x);
public static int UpperBound<T>(this IList<T> list, T value) => list.BinarySearch(value, true, 0, list.Count, Comparer<T>.Default);
public static int LowerBound<T>(this IList<T> list, T value) => list.BinarySearch(value, false, 0, list.Count, Comparer<T>.Default);
public static int BinarySearch<T>(this IList<T> list, T value, bool isUpperBound, int index, int length, Comparer<T> comparer)
{
var ng = index - 1;
var ok = index + length;
while (ok - ng > 1)
{
var mid = ng + (ok - ng) / 2;
var res = comparer.Compare(list[mid], value);
if (res < 0 || (isUpperBound && res == 0)) ng = mid;
else ok = mid;
}
return ok;
}
}
class Scanner
{
string[] s;
int i;
char[] separator = new char[] { ' ' };
public Scanner()
{
s = new string[0];
i = 0;
}
public string Read() => ReadString();
public string ReadString()
{
if (i < s.Length) return s[i++];
string st = Console.ReadLine();
while (st == "") st = Console.ReadLine();
s = st.Split(separator, StringSplitOptions.RemoveEmptyEntries);
if (s.Length == 0) return ReadString();
i = 0;
return s[i++];
}
public string[] ReadStringArray(int N)
{
string[] Array = new string[N];
for (int i = 0; i < N; i++)
{
Array[i] = ReadString();
}
return Array;
}
public int ReadInt()
{
return int.Parse(ReadString());
}
public int[] ReadIntArray(int N, int add = 0)
{
int[] Array = new int[N];
for (int i = 0; i < N; i++)
{
Array[i] = ReadInt() + add;
}
return Array;
}
public long ReadLong()
{
return long.Parse(ReadString());
}
public long[] ReadLongArray(int N, long add = 0)
{
long[] Array = new long[N];
for (int i = 0; i < N; i++)
{
Array[i] = ReadLong() + add;
}
return Array;
}
public double ReadDouble()
{
return double.Parse(ReadString());
}
public double[] ReadDoubleArray(int N, double add = 0)
{
double[] Array = new double[N];
for (int i = 0; i < N; i++)
{
Array[i] = ReadDouble() + add;
}
return Array;
}
public T1 ReadValue<T1>() => (T1)Convert.ChangeType(ReadString(), typeof(T1));
public (T1, T2) ReadValue<T1, T2>()
{
var inputs = ReadStringArray(2);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
return (v1, v2);
}
public (T1, T2, T3) ReadValue<T1, T2, T3>()
{
var inputs = ReadStringArray(3);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
return (v1, v2, v3);
}
public (T1, T2, T3, T4) ReadValue<T1, T2, T3, T4>()
{
var inputs = ReadStringArray(4);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
return (v1, v2, v3, v4);
}
public (T1, T2, T3, T4, T5) ReadValue<T1, T2, T3, T4, T5>()
{
var inputs = ReadStringArray(5);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
return (v1, v2, v3, v4, v5);
}
public (T1, T2, T3, T4, T5, T6) ReadValue<T1, T2, T3, T4, T5, T6>()
{
var inputs = ReadStringArray(6);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
var v6 = (T6)Convert.ChangeType(inputs[5], typeof(T6));
return (v1, v2, v3, v4, v5, v6);
}
public (T1, T2, T3, T4, T5, T6, T7) ReadValue<T1, T2, T3, T4, T5, T6, T7>()
{
var inputs = ReadStringArray(7);
var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
var v6 = (T6)Convert.ChangeType(inputs[5], typeof(T6));
var v7 = (T7)Convert.ChangeType(inputs[6], typeof(T7));
return (v1, v2, v3, v4, v5, v6, v7);
}
public T1[] ReadValueArray<T1>(int N)
{
var v1 = new T1[N];
for (int i = 0; i < N; i++)
{
v1[i] = ReadValue<T1>();
}
return v1;
}
public (T1[], T2[]) ReadValueArray<T1, T2>(int N)
{
var (v1, v2) = (new T1[N], new T2[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2) = ReadValue<T1, T2>();
v1[i] = t1;
v2[i] = t2;
}
return (v1, v2);
}
public (T1[], T2[], T3[]) ReadValueArray<T1, T2, T3>(int N)
{
var (v1, v2, v3) = (new T1[N], new T2[N], new T3[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2, t3) = ReadValue<T1, T2, T3>();
v1[i] = t1;
v2[i] = t2;
v3[i] = t3;
}
return (v1, v2, v3);
}
public (T1[], T2[], T3[], T4[]) ReadValueArray<T1, T2, T3, T4>(int N)
{
var (v1, v2, v3, v4) = (new T1[N], new T2[N], new T3[N], new T4[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2, t3, t4) = ReadValue<T1, T2, T3, T4>();
v1[i] = t1;
v2[i] = t2;
v3[i] = t3;
v4[i] = t4;
}
return (v1, v2, v3, v4);
}
public (T1[], T2[], T3[], T4[], T5[]) ReadValueArray<T1, T2, T3, T4, T5>(int N)
{
var (v1, v2, v3, v4, v5) = (new T1[N], new T2[N], new T3[N], new T4[N], new T5[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2, t3, t4, t5) = ReadValue<T1, T2, T3, T4, T5>();
v1[i] = t1;
v2[i] = t2;
v3[i] = t3;
v4[i] = t4;
v5[i] = t5;
}
return (v1, v2, v3, v4, v5);
}
public (T1[], T2[], T3[], T4[], T5[], T6[]) ReadValueArray<T1, T2, T3, T4, T5, T6>(int N)
{
var (v1, v2, v3, v4, v5, v6) = (new T1[N], new T2[N], new T3[N], new T4[N], new T5[N], new T6[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2, t3, t4, t5, t6) = ReadValue<T1, T2, T3, T4, T5, T6>();
v1[i] = t1;
v2[i] = t2;
v3[i] = t3;
v4[i] = t4;
v5[i] = t5;
v6[i] = t6;
}
return (v1, v2, v3, v4, v5, v6);
}
public (T1[], T2[], T3[], T4[], T5[], T6[], T7[]) ReadValueArray<T1, T2, T3, T4, T5, T6, T7>(int N)
{
var (v1, v2, v3, v4, v5, v6, v7) = (new T1[N], new T2[N], new T3[N], new T4[N], new T5[N], new T6[N], new T7[N]);
for (int i = 0; i < N; i++)
{
var (t1, t2, t3, t4, t5, t6, t7) = ReadValue<T1, T2, T3, T4, T5, T6, T7>();
v1[i] = t1;
v2[i] = t2;
v3[i] = t3;
v4[i] = t4;
v5[i] = t5;
v6[i] = t6;
v7[i] = t7;
}
return (v1, v2, v3, v4, v5, v6, v7);
}
}
}
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