Created
June 14, 2021 22:29
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#include <iostream> | |
#include <sstream> | |
#include <deque> | |
#include <vector> | |
#include <algorithm> | |
#include <random> | |
/* | |
* データ型 | |
*/ | |
typedef std::vector<int> Code; | |
typedef std::pair<int, int> HitBlow; | |
typedef std::deque<Code> CodeList; | |
/** | |
* @fn HitBlow countHitBlow(Code &code, Code &guess) | |
* @brief コード2つから, hit, blowを計算する | |
* @param[in] code コード | |
* @param[in] guess コード | |
* @return (hit, blow) | |
*/ | |
HitBlow countHitBlow( | |
Code &code, | |
Code &guess | |
) | |
{ | |
std::vector<int> x(2, 0); | |
std::vector<int> y(2, 0); | |
int hit = 0, blow = 0; | |
for( int i = 0; i < 2; i++ ) | |
{ | |
if( code[i] == guess[i] ) | |
{ | |
hit++; | |
} | |
else | |
{ | |
x[code[i]]++; | |
y[guess[i]]++; | |
} | |
} | |
for( int i = 0; i < 2; i++ ) | |
{ | |
blow += std::min(x[i], y[i]); | |
} | |
return HitBlow(hit, blow); | |
} | |
/** | |
* @fn Code trial(CodeList &S, Code &guess) | |
* @brief 推論コード候補集合Gから1つを選択する | |
* @param[in, out] S 秘密コードの候補集合 | |
* @param[in] 推論コード | |
*/ | |
void trial( | |
CodeList &S, | |
Code &guess | |
) | |
{ | |
// 入力待ち | |
int hit, blow; | |
std::cout << "guess is [ " << guess[0] << " " << guess[1] << " ]" << std::endl; | |
std::cout << " input hit blow (e.g. 2 2): "; | |
std::cin >> hit >> blow; | |
HitBlow InputHitBlow(hit, blow); | |
// 選別 | |
CodeList newS; | |
for ( Code code : S ) | |
{ | |
if( countHitBlow(code, guess) == InputHitBlow ) | |
{ | |
newS.push_back(code); | |
} | |
} | |
S = newS; | |
} | |
/** | |
* @fn Code policy(CodeList S, CodeList G) | |
* @brief 推論コード候補集合Gから1つを選択する | |
* @param[in] S 秘密コードの候補集合 | |
* @param[in] G 推論コードの候補集合 | |
* @return Code 推論コード | |
*/ | |
Code policy( | |
CodeList &S, | |
CodeList &G | |
) | |
{ | |
// random sampling from G | |
std::mt19937 engine(0); | |
std::uniform_int_distribution<> sampler(0, G.size()-1); | |
Code guess = G[sampler(engine)]; | |
return guess; | |
} | |
int main() | |
{ | |
// とりあえず(2色, 2ピン) | |
CodeList S{ Code{0,0}, Code{0,1}, Code{1,0}, Code{1,1} }; | |
// main | |
while( S.size() > 1 ) | |
{ | |
Code guess = policy(S, S); // G <- S | |
trial(S, guess); // update S | |
} | |
// post process | |
Code guess = S[0]; | |
std::cout << "guess is [ " << guess[0] << " " << guess[1] << " ]" << std::endl; | |
return 0; | |
} |
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