Move the sample bin-packing solver from algorithms to set_cover, the only place it is used.

The main reason is that we have several solvers, including some being open-sourced, in the `packing/` folder.

ortools/set_cover/samples/bin_packing.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "ortools/algorithms/bin_packing.h"
+#include "ortools/set_cover/samples/bin_packing.h"
 
 #include <absl/algorithm/container.h>
 #include <absl/container/flat_hash_set.h>

ortools/set_cover/samples/bin_packing.h

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef OR_TOOLS_ORTOOLS_ALGORITHMS_BIN_PACKING_H
-#define OR_TOOLS_ORTOOLS_ALGORITHMS_BIN_PACKING_H
+#ifndef OR_TOOLS_ORTOOLS_SET_COVER_SAMPLES_BIN_PACKING_H
+#define OR_TOOLS_ORTOOLS_SET_COVER_SAMPLES_BIN_PACKING_H
 
 #include <absl/algorithm/container.h>
 #include <absl/container/flat_hash_set.h>
@@ -177,4 +177,4 @@ void AddRandomizedBins(const BinPackingModel& model, BaseInt num_bins,
                        BinPackingSetCoverModel& scp_model, std::mt19937& rnd);
 
 }  // namespace operations_research
-#endif /* OR_TOOLS_ORTOOLS_ALGORITHMS_BIN_PACKING_H */
+#endif /* OR_TOOLS_ORTOOLS_SET_COVER_SAMPLES_BIN_PACKING_H */

ortools/set_cover/samples/bin_packing_cft.cc

@@ -18,10 +18,10 @@
 #include <cstdlib>
 #include <random>
 
-#include "ortools/algorithms/bin_packing.h"
 #include "ortools/base/init_google.h"
 #include "ortools/set_cover/base_types.h"
 #include "ortools/set_cover/set_cover_cft.h"
+#include "ortools/set_cover/samples/bin_packing.h"
 
 using namespace operations_research;
 ABSL_FLAG(std::string, instance, "", "BPP instance int RAIL format.");