/// A new decryptor without use of bitset. /// Uses bitwise operators. /// Number of Lines - 58 /// Created on - 02/02/2018 /// 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::cout, std::cin #include // std::stringstream #include // std::string #include // std:vector using namespace std; // Unable to get rid of this bad habit... inline void Invert(long long &num, int x) /// Inverts bit at position x. { num ^= (1ULL<>x)&1ULL); } inline void Change(long long &num, int x, int y) /// Changes bit at position x to y. { num^=(-(unsigned long)y^num)&(1UL<>hex>>v; return v; } vector Split(string HStr) /// Splits string to long long vector. { vector arr; size_t pos = 0; while(pos!=HStr.size()) {arr.push_back(Convert (HStr.substr(pos,4))); pos+=4;} return arr; } string Decode(vectorno) { long long num,n; string msg; for(long long k:no) { n=0; num=k; Invert(num,4); Change(n,0,Check(num,4)); // S1 - Invert bit 4 and copy to bit 0. for(int i=1;i<4;i++) { Change(n,i,Check(num,10+i)); } // S2 - Copy bits 11-13 to bits 1-3. Change(n,4,Check(num,1)); // S3 - Copy bit 1 to bit 4. for(int i=5;i<7;i++) { Invert(num,2+i); Change(n,i,Check(num,2+i)); } // S4 - Copy negtd. bits 7-8 to bits 5-6. Change(n,7,Check(num,10)); // S5 - Copy bit 10 to bit 7. msg+=static_cast(n); // Append Message with ASCII values. } return msg; } int main() { string Encrypt, Decrypt; getline(cin,Encrypt); if(Encrypt.empty()) Encrypt = "98EF122CB2193031C3799231BA643A7D5269435CB021C22CD0139044C10803392087BA68522799295A76D06C43783A78426CE020B270D000905D0318887420049032B00982087878E261427A5243F0540221905A606CB864B879C334E95A6344"; cout<<"Original Data - \n\n" <

Challenge - Special Decryption : BitManipulation : v2