1 files changed, 29 insertions, 0 deletions
diff --git a/challenge-276/ulrich-rieke/cpp/ch-2.cpp b/challenge-276/ulrich-rieke/cpp/ch-2.cpp
new file mode 100755
index 0000000000..a3c5d7e345
--- /dev/null
+++ b/challenge-276/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,29 @@
+#include <vector>
+#include <iostream>
+#include <iterator>
+#include <map>
+
+int main( ) {
+   std::cout << "Enter some integers, separated by blanks, 'e' to end!\n" ;
+   std::vector<int> numbers { std::istream_iterator<int>( std::cin ) , 
+      std::istream_iterator<int>( ) } ;
+   std::map<int , int> frequencies ;
+   for ( int i : numbers ) {
+      frequencies[i]++ ;
+   }
+   int elements = 0 ;//elements with maximum frequency
+   int maximum = 0 ;//maximum frequency
+   for ( auto p : frequencies ) {
+      if ( p.second > maximum ) 
+	 maximum = p.second ;
+   }
+   for ( auto p : frequencies ) {
+      if ( p.second == maximum ) 
+	 elements++ ;
+   }
+   //we want the product of maximum frequency and the number of elements that have it
+   std::cout << elements * maximum << '\n' ;
+   return 0 ;
+}
+
+