1 files changed, 0 insertions, 21 deletions
diff --git a/math/phi.cpp b/math/phi.cpp
deleted file mode 100644
index 482a139..0000000
--- a/math/phi.cpp
+++ /dev/null
@@ -1,21 +0,0 @@
-ll phi(ll n) { // Laufzeit: O(sqrt(n))
-	// Optimierung: Falls n prim, n - 1 zurückgeben
-	ll result = n;
-	for(ll i = 2; i * i <= n; ++i) {
-		if(n % i == 0) {	// Optimierung: Nur Primzahlen
-			while(n % i == 0) n /= i;
-			result -= result / i;
-	}}
-	if(n > 1) result -= result / n;
-	return result;
-}
-
-// Sieb, falls alle Werte benötigt werden.
-// Laufzeit: O(N*log(log(N)))
-vector<ll> phi(n + 1);
-for (int i = 1; i <= n; i++) phi[i] = i;
-for (int i = 2; i <= n; i++) if (phi[i] == i) {
-	for (int j = i; j <= n; j += i) {
-		phi[j] /= i;
-		phi[j] *= i - 1;
-}}