1 files changed, 57 insertions, 0 deletions
diff --git a/challenge-215/ulrich-rieke/cpp/ch-2.cpp b/challenge-215/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..e6f54d4baa
--- /dev/null
+++ b/challenge-215/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <string>
+#include <algorithm>
+#include <vector>
+
+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 << "Please enter a line of 1's and 0's, separated by blanks!\n" ;
+  std::string line ;
+  std::getline( std::cin , line ) ;
+  std::vector<std::string> numberstrings( split( line, " " ) ) ;
+  std::vector<int> numbers ;
+  for ( auto s : numberstrings )
+      numbers.push_back( std::stoi( s ) ) ;
+  std::cout << "How many 0's should be replaced ?\n" ;
+  int num ;
+  std::cin >> num ;
+  int necessary = 0 ;
+  if ( num == 1 )
+      necessary = 3 ;
+  if ( num > 1 )
+      necessary = 3 + num ;
+  int len = numbers.size( ) ;
+  if ( len < necessary || len == necessary )
+      std::cout << 0 << std::endl ;
+  else {
+      std::vector<bool> results ;
+      for ( int start = 0 ; start < len - necessary + 1 ; start++ ) {
+    if ( std::all_of( numbers.begin( ) + start , numbers.begin( ) + start
+          + necessary , []( int n ) { return n == 0 ; } ) ) {
+        results.push_back( true ) ;
+    }
+    else
+        results.push_back( false ) ;
+      }
+      if ( std::any_of( results.begin( ) , results.end( ) , []( auto b ) {
+          return b == true ; })) {
+    std::cout << 1 << std::endl ;
+      }
+      else {
+    std::cout << 0 << std::endl ;
+      }
+  }
+  return 0 ;
+}