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-rw-r--r--static/solver.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/static/solver.c b/static/solver.c
index d76d020..a06140e 100644
--- a/static/solver.c
+++ b/static/solver.c
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+//
// This is a reference implementation of the proof of work solver in C.
// For security reasons, it is recommended that you read and understand the
// entire program first if you actually want to run it.