commit c2328312eada1d6fc7f266ed23bd60aea55299b0
Author: Antoine Amarilli <a3nm@a3nm.net>
Date: Sun, 15 Jan 2017 21:56:15 +0100
explain
Diffstat:
| main.c | | | 44 | ++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 44 insertions(+), 0 deletions(-)
diff --git a/main.c b/main.c
@@ -0,0 +1,44 @@
+#include<stdio.h>
+#include<stdbool.h>
+#include<stdlib.h>
+
+// bruteforce https://oeis.org/A213918
+
+int res[10];
+int num = 0;
+
+bool ok(int i, int found) {
+ for (int j = 0; j < found; j++) {
+ if (res[j] % (i - res[j]))
+ return false;
+ }
+ return true;
+}
+
+bool search(int ci, int maxi, int found, int tofind) {
+ if (found == tofind)
+ return true;
+ for (int i = ci+1; i < maxi; i++) {
+ if (!ok(i, found))
+ continue;
+ res[found] = i;
+ if (search(i, maxi, found+1, tofind))
+ return true;
+ }
+ return false;
+}
+
+int main(int argc, char **argv) {
+ int k = atoi(argv[1]);
+ int n = atoi(argv[2]);
+ res[0] = 0;
+ if (search(0, k, 1, n)) {
+ printf("solution found:\n");
+ for (int i = 0; i < n; i++)
+ printf("%d ", res[i]);
+ printf("\n");
+ } else {
+ printf("nothing found :(\n");
+ }
+}
+
