1 files changed, 43 insertions, 0 deletions
diff --git a/challenge-125/ulrich-rieke/cpp/ch-1.cpp b/challenge-125/ulrich-rieke/cpp/ch-1.cpp
new file mode 100644
index 0000000000..e0d7336656
--- /dev/null
+++ b/challenge-125/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,43 @@
+#include <iostream>
+#include <cstdlib>
+#include <algorithm>
+#include <set>
+#include <vector>
+
+int main( int argc , char * argv[] ) {
+  int n = std::atoi( argv[ 1 ] ) ;
+  if ( n > 20 ) {
+      std::cerr << "Number entered should be an integer up to 20!" ;
+      exit( EXIT_FAILURE ) ;
+      return 1 ;
+  }
+  else {
+      std::set<std::vector<int> > triples ;
+      for ( int i = 1 ; i < 101 ; i++ ) {
+    for ( int j = 1 ; j < 101 ; j++ ) {
+        for ( int k = 1 ; k < 101 ; k++ ) {
+          if ( n == i || n == j || n == k ) {
+          if ( i * i + j * j == k * k ) {
+            std::vector<int> triple { i , j , k } ;
+            std::sort( triple.begin( ) , triple.end( ) ) ;
+            triples.insert( triple ) ;
+          }
+          }
+        }
+    }
+      }
+      if ( ! triples.empty( ) ) {
+    for ( auto & vec : triples ) {
+        std::cout << '(' ;
+        for ( auto num : vec ) {
+          std::cout << num << ' ' ;
+        }
+        std::cout << ")\n" ;
+    }
+      }
+      else {
+    std::cout << -1 << std::endl ;
+      }
+      return 0 ;
+  }
+}