Changes to be committed:

deleted:    proglabs/lab6/1.c
	new file:   proglabs/lab6/10.c
	new file:   proglabs/lab6/11.c
	modified:   proglabs/lab6/2.c
	modified:   proglabs/lab6/3.c
	new file:   proglabs/lab6/4.c
	new file:   proglabs/lab6/5.c
	new file:   proglabs/lab6/6.c
	new file:   proglabs/lab6/7.c
	new file:   proglabs/lab6/8.c
	new file:   proglabs/lab6/9.c

proglabs/lab6/9.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+int pr(long long n);
+
+int main() {
+    long long int x,i;
+    int y = 1;
+    if(!(scanf("%lld",&x)))return 1;
+
+    for(i = x; i > 1; --i)
+        if(pr(i))
+            printf("%lld\t",i);
+
+    return 0;
+}
+
+int pr(long long x) {
+    if (x < 2) return 0;
+    if (x == 2 || x == 3) return 1;
+    if (x % 2 == 0 || x % 3 == 0) return 0;
+
+    for (long long i = 5; i * i <= x; i += 6) {
+        if (x % i == 0 || x % (i + 2) == 0)
+            return 0;
+    }
+    return 1;
+}