1 files changed, 30 insertions, 0 deletions
diff --git a/challenge-261/ulrich-rieke/cpp/ch-1.cpp b/challenge-261/ulrich-rieke/cpp/ch-1.cpp
new file mode 100755
index 0000000000..a088bfc147
--- /dev/null
+++ b/challenge-261/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,30 @@
+#include <iostream>
+#include <numeric>
+#include <vector>
+#include <iterator>
+#include <cstdlib>
+
+int digitsum( int n ) {
+   int sum = 0 ;
+   while ( n != 0 ) {
+      sum += n % 10 ;
+      n /= 10 ;
+   }
+   return sum ;
+}
+
+int main( ) {
+   std::cout << "Enter some integers, separated by blanks!\n" ;
+   std::cout << "Enter e to end!\n" ;
+   std::vector<int> numbers {std::istream_iterator<int>{std::cin} , 
+      std::istream_iterator<int>{}} ;
+   int element_sum = std::accumulate( numbers.begin( ) , numbers.end( ) ,
+	 0 ) ;
+   std::vector<int> digitsums ;
+   for ( int i : numbers ) 
+      digitsums.push_back( digitsum( i ) ) ;
+   int total_digitsums = std::accumulate( digitsums.begin( ) , 
+	 digitsums.end( ) , 0 ) ;
+   std::cout << std::abs( total_digitsums - element_sum) << '\n' ;
+   return 0 ;
+}