148e3f363b 2011-09-10        kinaba: #include <iostream>
148e3f363b 2011-09-10        kinaba: #include <sstream>
148e3f363b 2011-09-10        kinaba: #include <iomanip>
148e3f363b 2011-09-10        kinaba: #include <vector>
148e3f363b 2011-09-10        kinaba: #include <string>
148e3f363b 2011-09-10        kinaba: #include <map>
148e3f363b 2011-09-10        kinaba: #include <set>
148e3f363b 2011-09-10        kinaba: #include <algorithm>
148e3f363b 2011-09-10        kinaba: #include <numeric>
148e3f363b 2011-09-10        kinaba: #include <iterator>
148e3f363b 2011-09-10        kinaba: #include <functional>
148e3f363b 2011-09-10        kinaba: #include <complex>
148e3f363b 2011-09-10        kinaba: #include <queue>
148e3f363b 2011-09-10        kinaba: #include <stack>
148e3f363b 2011-09-10        kinaba: #include <cmath>
148e3f363b 2011-09-10        kinaba: #include <cassert>
148e3f363b 2011-09-10        kinaba: #include <cstring>
148e3f363b 2011-09-10        kinaba: using namespace std;
148e3f363b 2011-09-10        kinaba: typedef long long LL;
148e3f363b 2011-09-10        kinaba: typedef complex<double> CMP;
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: class NetworkXOneTimePad { public:
148e3f363b 2011-09-10        kinaba: 	int crack(vector <string> plaintexts, vector <string> ciphertexts)
148e3f363b 2011-09-10        kinaba: 	{
148e3f363b 2011-09-10        kinaba: 		set<string> possible_keys;
148e3f363b 2011-09-10        kinaba: 		for(int i=0; i<plaintexts.size(); ++i)
148e3f363b 2011-09-10        kinaba: 			for(int j=0; j<ciphertexts.size(); ++j)
148e3f363b 2011-09-10        kinaba: 				possible_keys.insert(key(plaintexts[i], ciphertexts[j]));
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: 		int cnt = 0;
148e3f363b 2011-09-10        kinaba: 		for(set<string>::iterator it=possible_keys.begin(); it!=possible_keys.end(); ++it)
148e3f363b 2011-09-10        kinaba: 		{
148e3f363b 2011-09-10        kinaba: 			const string& key = *it;
148e3f363b 2011-09-10        kinaba: 			set<string> target(plaintexts.begin(), plaintexts.end());
148e3f363b 2011-09-10        kinaba: 			for(int i=0; i<ciphertexts.size(); ++i) {
148e3f363b 2011-09-10        kinaba: 				string ci = cipher(ciphertexts[i], key);
148e3f363b 2011-09-10        kinaba: 				if( !target.count(ci) )
148e3f363b 2011-09-10        kinaba: 					goto next;
148e3f363b 2011-09-10        kinaba: 				target.erase(ci);
148e3f363b 2011-09-10        kinaba: 			}
148e3f363b 2011-09-10        kinaba: 			++cnt;
148e3f363b 2011-09-10        kinaba: 		next:;
148e3f363b 2011-09-10        kinaba: 		}
148e3f363b 2011-09-10        kinaba: 		return cnt;
148e3f363b 2011-09-10        kinaba: 	}
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: 	string cipher(const string& a, const string& b)
148e3f363b 2011-09-10        kinaba: 	{
148e3f363b 2011-09-10        kinaba: 		string c;
148e3f363b 2011-09-10        kinaba: 		for(int i=0; i<a.size(); ++i)
148e3f363b 2011-09-10        kinaba: 			c += char(a[i]^(b[i]=='1'));
148e3f363b 2011-09-10        kinaba: 		return c;
148e3f363b 2011-09-10        kinaba: 	}
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: 	string key(const string& a, const string& b)
148e3f363b 2011-09-10        kinaba: 	{
148e3f363b 2011-09-10        kinaba: 		string c;
148e3f363b 2011-09-10        kinaba: 		for(int i=0; i<a.size(); ++i)
148e3f363b 2011-09-10        kinaba: 			c += (a[i]==b[i] ? '0' : '1');
148e3f363b 2011-09-10        kinaba: 		return c;
148e3f363b 2011-09-10        kinaba: 	}
148e3f363b 2011-09-10        kinaba: };
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: // BEGIN CUT HERE
148e3f363b 2011-09-10        kinaba: #include <ctime>
148e3f363b 2011-09-10        kinaba: double start_time; string timer()
148e3f363b 2011-09-10        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
148e3f363b 2011-09-10        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
148e3f363b 2011-09-10        kinaba:  { os << "{ ";
148e3f363b 2011-09-10        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
148e3f363b 2011-09-10        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
148e3f363b 2011-09-10        kinaba: void verify_case(const int& Expected, const int& Received) {
148e3f363b 2011-09-10        kinaba:  bool ok = (Expected == Received);
148e3f363b 2011-09-10        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
148e3f363b 2011-09-10        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
148e3f363b 2011-09-10        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
148e3f363b 2011-09-10        kinaba: #define END	 verify_case(_, NetworkXOneTimePad().crack(plaintexts, ciphertexts));}
148e3f363b 2011-09-10        kinaba: int main(){
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: CASE(0)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = {"110", "001"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = {"101", "010"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = 2;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(1)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = {"00", "01", "10", "11"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = {"00", "01", "10", "11"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = 4;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(2)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = {"01", "10"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = {"00"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = 2;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(3)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = {"000", "111", "010", "101", "110", "001"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = {"011", "100"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = 6;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: /*
148e3f363b 2011-09-10        kinaba: CASE(4)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = ;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(5)
148e3f363b 2011-09-10        kinaba: 	string plaintexts_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
148e3f363b 2011-09-10        kinaba: 	string ciphertexts_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
148e3f363b 2011-09-10        kinaba: 	int _ = ;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: */
148e3f363b 2011-09-10        kinaba: }
148e3f363b 2011-09-10        kinaba: // END CUT HERE