• branch=trunk inherited from [9165bd3629]
• sym-trunk inherited from [9165bd3629]

Added SRM/516-U/2A.cpp version [2e6ce5bbe0d9efd7]

            1  +#include <iostream>
            2  +#include <sstream>
            3  +#include <iomanip>
            4  +#include <vector>
            5  +#include <string>
            6  +#include <map>
            7  +#include <set>
            8  +#include <algorithm>
            9  +#include <numeric>
           10  +#include <iterator>
           11  +#include <functional>
           12  +#include <complex>
           13  +#include <queue>
           14  +#include <stack>
           15  +#include <cmath>
           16  +#include <cassert>
           17  +#include <cstring>
           18  +using namespace std;
           19  +typedef long long LL;
           20  +typedef complex<double> CMP;
           21  +
           22  +class NetworkXZeroOne { public:
           23  + string reconstruct(string message)
           24  + {
           25  +  if( message[0]=='?' ) {
           26  +   string msg = message;
           27  +   msg[0] = 'o';
           28  +   if( check(msg) )
           29  +    return msg;
           30  +   message[0] = 'x';
           31  +  }
           32  +  check(message);
           33  +  return message;
           34  + }
           35  +
           36  + bool check(string& msg)
           37  + {
           38  +  for(int i=1; i<msg.size(); ++i)
           39  +   if( msg[i]=='?' ) {
           40  +    if( msg[i-1]=='x' )
           41  +     msg[i]='o';
           42  +    else
           43  +     msg[i]='x';
           44  +   }
           45  +  for(int i=0; i<msg.size(); ++i)
           46  +   for(int k=2; i+k<=msg.size(); k+=2)
           47  +    if( count(msg.begin()+i, msg.begin()+i+k, 'o')*2 != k )
           48  +     return false;
           49  +  return true;
           50  + }
           51  +};
           52  +
           53  +// BEGIN CUT HERE
           54  +#include <ctime>
           55  +double start_time; string timer()
           56  + { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
           57  +template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
           58  + { os << "{ ";
           59  +   for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
           60  +   os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
           61  +void verify_case(const string& Expected, const string& Received) {
           62  + bool ok = (Expected == Received);
           63  + if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
           64  + cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
           65  +#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
           66  +#define END  verify_case(_, NetworkXZeroOne().reconstruct(message));}
           67  +int main(){
           68  +
           69  +CASE(0)
           70  + string message = "x?x?";
           71  + string _ = "xoxo";
           72  +END
           73  +CASE(1)
           74  + string message = "?xo?";
           75  + string _ = "oxox";
           76  +END
           77  +CASE(2)
           78  + string message = "xo";
           79  + string _ = "xo";
           80  +END
           81  +CASE(3)
           82  + string message = "o??x??o";
           83  + string _ = "oxoxoxo";
           84  +END
           85  +CASE(4)
           86  + string message = "???????x";
           87  + string _ = "oxoxoxox";
           88  +END
           89  +/*
           90  +CASE(5)
           91  + string message = ;
           92  + string _ = ;
           93  +END
           94  +CASE(6)
           95  + string message = ;
           96  + string _ = ;
           97  +END
           98  +*/
           99  +}
          100  +// END CUT HERE

Added SRM/516-U/2B.cpp version [8e15fec270ef292a]

            1  +#include <iostream>
            2  +#include <sstream>
            3  +#include <iomanip>
            4  +#include <vector>
            5  +#include <string>
            6  +#include <map>
            7  +#include <set>
            8  +#include <algorithm>
            9  +#include <numeric>
           10  +#include <iterator>
           11  +#include <functional>
           12  +#include <complex>
           13  +#include <queue>
           14  +#include <stack>
           15  +#include <cmath>
           16  +#include <cassert>
           17  +#include <cstring>
           18  +using namespace std;
           19  +typedef long long LL;
           20  +typedef complex<double> CMP;
           21  +
           22  +class NetworkXOneTimePad { public:
           23  + int crack(vector <string> plaintexts, vector <string> ciphertexts)
           24  + {
           25  +  set<string> possible_keys;
           26  +  for(int i=0; i<plaintexts.size(); ++i)
           27  +   for(int j=0; j<ciphertexts.size(); ++j)
           28  +    possible_keys.insert(key(plaintexts[i], ciphertexts[j]));
           29  +
           30  +  int cnt = 0;
           31  +  for(set<string>::iterator it=possible_keys.begin(); it!=possible_keys.end(); ++it)
           32  +  {
           33  +   const string& key = *it;
           34  +   set<string> target(plaintexts.begin(), plaintexts.end());
           35  +   for(int i=0; i<ciphertexts.size(); ++i) {
           36  +    string ci = cipher(ciphertexts[i], key);
           37  +    if( !target.count(ci) )
           38  +     goto next;
           39  +    target.erase(ci);
           40  +   }
           41  +   ++cnt;
           42  +  next:;
           43  +  }
           44  +  return cnt;
           45  + }
           46  +
           47  + string cipher(const string& a, const string& b)
           48  + {
           49  +  string c;
           50  +  for(int i=0; i<a.size(); ++i)
           51  +   c += char(a[i]^(b[i]=='1'));
           52  +  return c;
           53  + }
           54  +
           55  + string key(const string& a, const string& b)
           56  + {
           57  +  string c;
           58  +  for(int i=0; i<a.size(); ++i)
           59  +   c += (a[i]==b[i] ? '0' : '1');
           60  +  return c;
           61  + }
           62  +};
           63  +
           64  +// BEGIN CUT HERE
           65  +#include <ctime>
           66  +double start_time; string timer()
           67  + { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
           68  +template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
           69  + { os << "{ ";
           70  +   for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
           71  +   os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
           72  +void verify_case(const int& Expected, const int& Received) {
           73  + bool ok = (Expected == Received);
           74  + if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
           75  + cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
           76  +#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
           77  +#define END  verify_case(_, NetworkXOneTimePad().crack(plaintexts, ciphertexts));}
           78  +int main(){
           79  +
           80  +CASE(0)
           81  + string plaintexts_[] = {"110", "001"};
           82  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
           83  + string ciphertexts_[] = {"101", "010"};
           84  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
           85  + int _ = 2;
           86  +END
           87  +CASE(1)
           88  + string plaintexts_[] = {"00", "01", "10", "11"};
           89  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
           90  + string ciphertexts_[] = {"00", "01", "10", "11"};
           91  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
           92  + int _ = 4;
           93  +END
           94  +CASE(2)
           95  + string plaintexts_[] = {"01", "10"};
           96  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
           97  + string ciphertexts_[] = {"00"};
           98  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
           99  + int _ = 2;
          100  +END
          101  +CASE(3)
          102  + string plaintexts_[] = {"000", "111", "010", "101", "110", "001"};
          103  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
          104  + string ciphertexts_[] = {"011", "100"};
          105  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
          106  + int _ = 6;
          107  +END
          108  +/*
          109  +CASE(4)
          110  + string plaintexts_[] = ;
          111  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
          112  + string ciphertexts_[] = ;
          113  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
          114  + int _ = ;
          115  +END
          116  +CASE(5)
          117  + string plaintexts_[] = ;
          118  +   vector <string> plaintexts(plaintexts_, plaintexts_+sizeof(plaintexts_)/sizeof(*plaintexts_));
          119  + string ciphertexts_[] = ;
          120  +   vector <string> ciphertexts(ciphertexts_, ciphertexts_+sizeof(ciphertexts_)/sizeof(*ciphertexts_));
          121  + int _ = ;
          122  +END
          123  +*/
          124  +}
          125  +// END CUT HERE

Added SRM/516-U/2C.cpp version [9236182d87218311]

            1  +#include <iostream>
            2  +#include <sstream>
            3  +#include <iomanip>
            4  +#include <vector>
            5  +#include <string>
            6  +#include <map>
            7  +#include <set>
            8  +#include <algorithm>
            9  +#include <numeric>
           10  +#include <iterator>
           11  +#include <functional>
           12  +#include <complex>
           13  +#include <queue>
           14  +#include <stack>
           15  +#include <cmath>
           16  +#include <cassert>
           17  +#include <cstring>
           18  +using namespace std;
           19  +typedef long long LL;
           20  +typedef complex<double> CMP;
           21  +
           22  +class NetworkXMessageRecovery { public:
           23  + string recover(vector <string> messages)
           24  + {
           25  +  map< char, set<char> > prev;
           26  +  for(int i=0; i<messages.size(); ++i) {
           27  +   prev[messages[i][0]];
           28  +   for(int j=0; j+1<messages[i].size(); ++j)
           29  +    prev[messages[i][j+1]].insert(messages[i][j]);
           30  +  }
           31  +
           32  +  string result;
           33  +  while( !prev.empty() )
           34  +  {
           35  +   set<char> cand;
           36  +   for(map< char,set<char> >::iterator it=prev.begin(); it!=prev.end(); ++it)
           37  +    if( it->second.empty() )
           38  +     cand.insert(it->first);
           39  +   char c = *cand.begin();
           40  +   result += c;
           41  +   for(map< char,set<char> >::iterator it=prev.begin(); it!=prev.end(); ++it)
           42  +    it->second.erase(c);
           43  +   prev.erase(c);
           44  +  }
           45  +  return result;
           46  + }
           47  +};
           48  +
           49  +// BEGIN CUT HERE
           50  +#include <ctime>
           51  +double start_time; string timer()
           52  + { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
           53  +template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
           54  + { os << "{ ";
           55  +   for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
           56  +   os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
           57  +void verify_case(const string& Expected, const string& Received) {
           58  + bool ok = (Expected == Received);
           59  + if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
           60  + cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
           61  +#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
           62  +#define END  verify_case(_, NetworkXMessageRecovery().recover(messages));}
           63  +int main(){
           64  +
           65  +CASE(0)
           66  + string messages_[] = {"acd", "bce"};
           67  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           68  + string _ = "abcde";
           69  +END
           70  +CASE(1)
           71  + string messages_[] = {"ed", "dc", "cb", "ba"};
           72  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           73  + string _ = "edcba";
           74  +END
           75  +CASE(2)
           76  + string messages_[] = {"Fox", "Ciel", "FoxCiel"};
           77  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           78  + string _ = "FoxCiel";
           79  +END
           80  +CASE(3)
           81  + string messages_[] = {"a", "A"};
           82  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           83  + string _ = "Aa";
           84  +END
           85  +/*
           86  +CASE(4)
           87  + string messages_[] = ;
           88  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           89  + string _ = ;
           90  +END
           91  +CASE(5)
           92  + string messages_[] = ;
           93  +   vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
           94  + string _ = ;
           95  +END
           96  +*/
           97  +}
           98  +// END CUT HERE