Graph, Number Theory, String Hashing Algo added

Number Theory/extended_gcd_recursive.cpp

@@ -0,0 +1,12 @@
+//Extended gcd -> Recursive
+
+tuple<int,int,int> extended_gcd( int a, int b){
+	
+	if( b == 0 ){
+		return {1,0,a};
+	}
+	
+	int x,y,g;
+	tie(x,y,g) = extended_gcd( b , a%b );
+	return {y , x - (a/b)*y , g};
+}