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-rw-r--r--src/Persistent_cohomology/example/custom_persistence_sort.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Persistent_cohomology/example/custom_persistence_sort.cpp b/src/Persistent_cohomology/example/custom_persistence_sort.cpp
index 4dab4560..d591a0d0 100644
--- a/src/Persistent_cohomology/example/custom_persistence_sort.cpp
+++ b/src/Persistent_cohomology/example/custom_persistence_sort.cpp
@@ -32,6 +32,7 @@
#include <iterator>
#include <vector>
#include <fstream> // for std::ofstream
+#include <algorithm> // for std::sort
using Kernel = CGAL::Epick_d< CGAL::Dimension_tag<3> >;