1 files changed, 33 insertions, 0 deletions
diff --git a/challenge-283/ulrich-rieke/cpp/ch-1.cpp b/challenge-283/ulrich-rieke/cpp/ch-1.cpp
new file mode 100755
index 0000000000..908539ecf9
--- /dev/null
+++ b/challenge-283/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,33 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <map>
+#include <sstream>
+
+std::vector<std::string> split( std::string text , const char delimiter ) {
+   std::stringstream instr { text } ;
+   std::string word ;
+   std::vector<std::string> tokens ;
+   while ( std::getline( instr , word , delimiter )) 
+      tokens.push_back( word ) ;
+   return tokens ;
+}
+
+int main( ) {
+   std::cout << "Enter some integers several times , one only once!\n" ;
+   std::string line ;
+   std::getline( std::cin , line ) ;
+   auto tokens { split( line, ' ' ) } ;
+   std::vector<int> numbers ;
+   for ( auto s : tokens ) 
+      numbers.push_back( std::stoi( s ) ) ;
+   std::map<int , int> frequencies ;
+   for ( int i : numbers ) 
+      frequencies[i]++ ;
+   for ( auto it = frequencies.begin( ) ; it != frequencies.end( ) ; ++it ) {
+      if ( it->second == 1 ) {
+	 std::cout << it->first << '\n' ;
+      }
+   }
+   return 0 ;
+}