結果
問題 | No.2271 平方根の13桁精度近似計算 |
ユーザー | 👑 p-adic |
提出日時 | 2022-10-02 09:10:19 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 2,842 bytes |
コンパイル時間 | 707 ms |
コンパイル使用メモリ | 70,380 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-06 23:58:40 |
合計ジャッジ時間 | 2,586 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,944 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,944 KB |
testcase_14 | AC | 1 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,940 KB |
testcase_19 | AC | 1 ms
6,940 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,944 KB |
testcase_22 | AC | 1 ms
6,940 KB |
testcase_23 | AC | 2 ms
6,944 KB |
testcase_24 | AC | 1 ms
6,944 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,944 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,940 KB |
testcase_30 | AC | 2 ms
6,944 KB |
testcase_31 | AC | 2 ms
6,940 KB |
testcase_32 | AC | 2 ms
6,940 KB |
testcase_33 | AC | 2 ms
6,940 KB |
testcase_34 | AC | 2 ms
6,940 KB |
testcase_35 | AC | 2 ms
6,940 KB |
testcase_36 | AC | 2 ms
6,944 KB |
testcase_37 | AC | 2 ms
6,940 KB |
testcase_38 | AC | 2 ms
6,944 KB |
testcase_39 | AC | 2 ms
6,944 KB |
ソースコード
#include <iostream> #include <string> #include <stdio.h> #include <stdint.h> using namespace std; using ll = long long; #define CIN( LL , A ) LL A; cin >> A #define FOR( VAR , INITIAL , FINAL_PLUS_ONE ) for( remove_const<remove_reference<decltype( FINAL_PLUS_ONE )>::type >::type VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) #define REPEAT( HOW_MANY_TIMES ) FOR( VARIABLE_FOR_REPEAT , 0 , HOW_MANY_TIMES ) #define QUIT return 0 #define RETURN( ANSWER ) cout << ( ANSWER ) << "\n"; QUIT #include <cassert> #define MAIN main int MAIN() { CIN( ll , N ); constexpr const ll bound = ( ll( 1 ) << 29 ) + 1; assert( -bound < N && N < bound ); CIN( int , E ); assert( 0 <= E && E <= 13 ); if( N == 0 ){ RETURN( 0 ); } else if( N < 0 ){ N += 1220703125; } int vN = 0; while( N % 5 == 0 ){ N /= 5; vN++; } if( vN >= E ){ RETURN( 0 ); } else if( vN % 2 == 1 ){ RETURN( "NaN" ); } vN /= 2; int E_minus_vN_half = E - vN; ll five_power_E_minus_vN_half = 1; REPEAT( E_minus_vN_half ){ five_power_E_minus_vN_half *= 5; } int kN = 0; // mod 5^13 = 1220703125 での1の原始4乗根123327057を前準備で計算 ll zeta = 123327057 % five_power_E_minus_vN_half; while( N % 5 != 1 ){ N = ( N * zeta ) % five_power_E_minus_vN_half; kN++; } if( kN % 2 == 1 ){ RETURN( "NaN" ); } N--; // mod 5^13 = 1220703125 での5素成分の逆元を前準備で計算 constexpr const ll inverse[18] = { 0 , // ダミー 1 , 610351563 , 406901042 , 915527344 , 1 , 203450521 , 697544643 , 457763672 , 949435764 , 610351563 , 887784091 , 712076823 , 469501202 , 959123884 , 406901042 , 228881836 , 789866728 }; const ll& half = inverse[2]; ll r = 1; ll uN_minus_power = 1; ll product = 1; ll factorial = 1; ll five_power_i = 1; ll term; FOR( i , 1 , 18 ){ uN_minus_power = ( uN_minus_power * N ) % five_power_E_minus_vN_half; product = ( product * ( half + 1 - i ) ) % five_power_E_minus_vN_half; factorial = ( factorial * inverse[i] ) % five_power_E_minus_vN_half; if( i != 0 && i % 5 == 0 ){ five_power_i *= 5; } term = ( product * factorial ) % five_power_E_minus_vN_half; term = ( term * ( uN_minus_power / five_power_i ) ) % five_power_E_minus_vN_half; r = ( r + term ) % five_power_E_minus_vN_half; } kN = ( ( 4 - kN ) % 4 ) / 2; REPEAT( kN ){ r = ( r * zeta ) % five_power_E_minus_vN_half; } REPEAT( vN ){ r *= 5; } r %= five_power_E_minus_vN_half; if( r < bound ){ RETURN( r ); } ll five_power_E = five_power_E_minus_vN_half; REPEAT( vN ){ five_power_E *= 5; } r = five_power_E - r; if( r < bound ){ RETURN( r ); } RETURN( "NaN" ); }