1 files changed, 36 insertions, 0 deletions
diff --git a/challenge-194/ulrich-rieke/cpp/ch-2.cpp b/challenge-194/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..e7163fdfc7
--- /dev/null
+++ b/challenge-194/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include <string>
+#include <map>
+#include <algorithm>
+#include <vector>
+
+int main( int argc , char * argv[] ) {
+  if ( argc != 2 ) {
+      std::cerr << "Please use <challenge194_2> <string>!\n" ;
+      return 1 ;
+  }
+  else {
+      std::string myString( argv[1] ) ;
+      std::map<char , int> letterfrequencies ;
+      for ( char c : myString ) {
+    letterfrequencies[c]++ ;
+      }
+      std::vector<int> frequencies ;
+      for ( auto p : letterfrequencies )
+    frequencies.push_back( p.second ) ;
+      int maximum = *std::max_element(frequencies.begin( ) ,
+        frequencies.end( ) ) ;
+      int minimum = *std::min_element( frequencies.begin( ) ,
+        frequencies.end( ) ) ;
+      int count = 0 ;
+      for ( auto p : letterfrequencies ) {
+    if ( p.second == minimum )
+        count++ ;
+      }
+      if ( maximum == minimum + 1 && count == letterfrequencies.size( ) - 1 )
+    std::cout << 1 << std::endl ;
+      else
+    std::cout << 0 << std::endl ;
+      return 0 ;
+  }
+}