3 files changed, 30 insertions, 0 deletions

diff --git a/mat/euler/4/Makefile b/mat/euler/4/Makefile
new file mode 100644
index 0000000..2def8af
--- /dev/null
+++ b/mat/euler/4/Makefile
@@ -0,0 +1,2 @@
+default:
+	gcc prog.c
diff --git a/mat/euler/4/a.out b/mat/euler/4/a.out
new file mode 100755
index 0000000..336eb2e
--- /dev/null
+++ b/mat/euler/4/a.out
diff --git a/mat/euler/4/prog.c b/mat/euler/4/prog.c
new file mode 100644
index 0000000..151dea9
--- /dev/null
+++ b/mat/euler/4/prog.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char ** argv) {
+	if (argc != 1+2) {
+		fprintf(stderr, "uporaba: %s <min> <max>\nprimer: %s 100 999\n", argv[0], argv[0]);
+		return 1;
+	}
+	size_t i, k;
+	unsigned long long int d = 0;
+	unsigned long long int j[2];
+	unsigned long long int min = atoi(argv[1]);
+	unsigned long long int max = atoi(argv[2]);
+	unsigned long long int step = 1;
+	char s[256] = "";
+	for (j[0] = min; j[0] <= max; j[0]++)
+		for (j[1] = min; j[1] <= max; j[1]++) {
+			sprintf(s, "%lld", j[0]*j[1]);
+			i = strlen(s);
+			for (k = 0; k < i; k++)
+				if (s[k] != s[(i-1)-k])
+					break;
+				else if (k >= i-1 && d < j[0]*j[1])
+					d = j[0]*j[1];
+		}
+	fprintf(stdout, "konec. našel največji palindrom %lld.\n", d);
+	return 0;
+}