Merge branch 'manwar:master' into master

1 files changed, 54 insertions, 0 deletions

diff --git a/challenge-195/ulrich-rieke/cpp/ch-2.cpp b/challenge-195/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..befdd7eb11
--- /dev/null
+++ b/challenge-195/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,54 @@
+#include <iostream>
+#include <string>
+#include <map>
+#include <utility>
+#include <algorithm>
+#include <vector>
+
+std::vector<std::string> split( const std::string & startline , const std::string & sep ) {
+  std::vector<std::string> separated ;
+  std::string::size_type start { 0 } ;
+  std::string::size_type pos ;
+  do {
+      pos = startline.find_first_of( sep , start ) ;
+      separated.push_back( startline.substr(start , pos - start )) ;
+      start = pos + 1 ;
+  } while ( pos != std::string::npos ) ;
+  return separated ;
+}
+
+int main( ) {
+  std::cout << "Please enter some integers, separated by blanks!\n" ;
+  std::string line ;
+  std::getline( std::cin , line ) ;
+  std::vector<int> evens ;
+  std::vector<std::string> numberstrings( split( line , " " ) ) ;
+  for ( auto & s : numberstrings ) {
+      int num = std::stoi( s ) ;
+      if ( num % 2 == 0 )
+    evens.push_back( num ) ;
+  }
+  if ( evens.size( ) != 0 ) {
+      std::map<int , int> frequencies ;
+      for ( int i : evens ) {
+    frequencies[ i ]++ ;
+      }
+      std::vector<std::pair<int , int>> allFrequencies ( frequencies.begin( ),
+        frequencies.end( ) ) ;
+      std::sort ( allFrequencies.begin( ) , allFrequencies.end( ) ,
+        [ ] ( const auto & a, const auto & b ) { return a.second
+        > b.second ; } ) ;
+      if ( allFrequencies.begin( )->second !=
+        (allFrequencies.begin( ) + 1)->second ) {
+    std::cout << allFrequencies.begin( )->first << std::endl ;
+      }
+      else {
+    std::sort( evens.begin( ) , evens.end( ) ) ;
+    std::cout << *evens.begin( ) << std::endl ;
+      }
+  }
+  else {
+      std::cout << -1 << std::endl ;
+  }
+  return 0 ;
+}