1 files changed, 33 insertions, 0 deletions
diff --git a/mat/euler/12/prog.c b/mat/euler/12/prog.c
new file mode 100644
index 0000000..7af0f37
--- /dev/null
+++ b/mat/euler/12/prog.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+int main (int argc, char ** argv) {
+	if (argc != 1 + 1) {
+		fprintf(stderr, "uporaba: %s <stevilka>, \nprimer: %s 500\n", argv[0], argv[0]);
+		return 1;
+	}
+	unsigned long int n = strtol(argv[1], NULL, 10);
+	unsigned long long int i = 1;
+	unsigned long long int j = 0;
+	unsigned long long int d = 0;
+	unsigned long long int s = 0; // dejansko trikotniško število.
+	while (1) {
+		s = s+i;
+		fprintf(stderr, "\rpreizkušam število %lld ...", i);
+		d = 0;
+		for (j = 2; j < ceill(sqrtl(s)); j++) {
+			if (s % j == 0)
+				d++;
+		}
+		d = (d*2)+2; // dva dodamo, ker sta to število samo in 1
+		if (d > n) {
+			fprintf(stdout, "\rnašel število %lld z %lld delitelji\n", s, d);
+			return 0;
+		}
+		i++;
+		if (i <= 1) // int rollover
+			break;
+	}
+	fprintf(stderr, "napaka. intager rollover pred najdenim rezultatom!\n");
+	return 2;
+}