1 files changed, 37 insertions, 0 deletions
diff --git a/challenge-207/ulrich-rieke/cpp/ch-2.cpp b/challenge-207/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..cf957b6234
--- /dev/null
+++ b/challenge-207/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,37 @@
+#include <vector>
+#include <iostream>
+#include <algorithm>
+#include <string>
+
+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 << "Enter some integers, separated by a blank!\n" ;
+  std::string line ;
+  std::getline( std::cin , line ) ;
+  std::vector<std::string> numberstrings( split( line , " " ) ) ;
+  std::vector<int> numbers ;
+  for ( auto & st : numberstrings )
+      numbers.push_back( std::stoi( st ) ) ;
+  std::sort( numbers.begin( ) , numbers.end( ) , []( int a , int b ) {
+    return a > b ; } ) ;
+  std::vector<int> possible_h ;
+  for ( int i = 0 ; i < numbers.size( ) ; i++ ) {
+      if ( numbers[ i ] >= ( i + 1 ) )
+    possible_h.push_back( i + 1 ) ;
+  }
+  std::cout << *max_element( possible_h.begin( ) , possible_h.end( ) ) <<
+      std::endl ;
+  return 0 ;
+}