diff --git a/R/r1.R b/R/r1.R
index f4f4803..dc86a6d 100644
--- a/R/r1.R
+++ b/R/r1.R
@@ -9,3 +9,9 @@ f1 <- function(n) {
 n <- 1:10000
 
 f1(n)
+
+f2 <- function(n) {
+	sum(n^2)
+}
+
+mark(f1(n), f2(n))
diff --git a/r1.R b/r1.R
new file mode 100644
index 0000000..dc86a6d
--- /dev/null
+++ b/r1.R
@@ -0,0 +1,17 @@
+f1 <- function(n) {
+  squares_sum <- 0
+  for(i in 1:length(n)) {
+    squares_sum <- squares_sum + n[i]^2
+  }
+  squares_sum
+}
+
+n <- 1:10000
+
+f1(n)
+
+f2 <- function(n) {
+	sum(n^2)
+}
+
+mark(f1(n), f2(n))