1 files changed, 2 insertions, 2 deletions
diff --git a/19.c b/19.c
index f44f46c..4ea88c2 100644
--- a/19.c
+++ b/19.c
@@ -322,7 +322,7 @@ main(int argc, char ** argv)
 	int debug = 0, rounds = 24;
 	char const * build = "exhaustive", * output = "quality";
 	int quality = 0, i;
-	long product = 1;
+	unsigned long product = 1;
 	regex_t reblueprint;
 	char buf[BUFSIZ];
 
@@ -427,7 +427,7 @@ main(int argc, char ** argv)
 		printf("Total quality level = %d\n", quality);
 	}
 	else if (strcmp(output, "product") == 0) {
-		printf("Total geode product = %ld\n", product);
+		printf("Total geode product = %lu\n", product);
 	}
 	else {
 		fprintf(stderr, "Unknown output type: %s\n", output);