/// Number of Lines - 52 /// Created on - 29/01/2018 /// Input - String to Decode. You may even /// leave it empty, for then it will /// use a default string. /// Encryptor - https://code.sololearn.com/cfW9kFYzDDxy/#cpp #include // std::transform #include // std::cout, std::cin #include // std::stringstream #include // std::bitset #include // std::isupper #include // std::vector using namespace std; // Unable to get rid of this bad habit... long long Convert(string s) /// Converts string to long long. { long long v; stringstream ss("0x"+s); ss>>hex>>v; return v; } vector> Split(string HStr) /// Splits String to a 16 bitset vector. { vector> BinVec;size_t pos = 0; while(pos!=HStr.size()) {BinVec.push_back(bitset<16> (Convert(HStr.substr(pos,4)))); pos+=4;} return BinVec; } string Decode(vector> BV) /// Decodes Message from 16 bitset vector. { auto decodealgo = [](bitset<16> bin)-> bitset<8> { bitset<8> bout; bout[0] = ~bin[4]; // S1 - Invert bit 4 and copy to bit 0. for(int i=1;i<4;i++) bout[i] = bin[10+i]; // S2 - Copy bits 11-13 to bits 1-3. bout[4] = bin[1]; // S3 - Copy bit 1 to bit 4. for(int i=5;i<7;i++) bout[i] = ~bin[2+i]; // S4 - Copy negtd. bits 7-8 to bits 5-6. bout[7] = bin[10]; return bout; // S5 - Copy bit 10 to bit 7. }; vector> DecOut; DecOut.resize(BV.size()); transform(BV.begin(),BV.end(), DecOut.begin(),decodealgo); string message; for(bitset<8> ch:DecOut) { message += static_cast (ch.to_ulong());} /// Append message with ASCII vaiues. return message; } int main() { string Encrypt, Decrypt; getline(cin,Encrypt); if(Encrypt.empty()) Encrypt = "98EF122CB2193031C3799231BA643A7D5269435CB021C22CD0139044C10803392087BA68522799295A76D06C43783A78426CE020B270D000905D0318887420049032B00982087878E261427A5243F0540221905A606CB864B879C334E95A6344"; cout<<"Original Data - \n\n" <

Challenge - Special Decryption : BitManipulation : v1