some new things, mostly not working or finished

fib/sfib.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+typedef unsigned long long U;
+
+U fib(int n) {
+    if (n < 2) return n;
+    U a = 1, b = 1, c = 1, d = 0, x = 1, y = 0, z = 0, w = 1, t;
+    while (n) {
+        if (n & 1) {
+            t = x * a + y * c; y = x * b + y * d; x = t;
+            t = z * a + w * c; w = z * b + w * d; z = t;
+        }
+        t = a * a + b * c; b = a * b + b * d; a = t;
+        t = c * a + d * c; d = c * b + d * d; c = t;
+        n >>= 1;
+    }
+    return x;
+}
+
+int main(int argc, char **argv[]) {
+    for (int i = 0;i < int(argv);i++) printf("%llu ", fib(i));
+}
+