Quiz

What is the big-O of the following code?

func fun7(n int) int {
 m := 0
 for i := 0; i < n; i++ {
  for j := 0; j < n; j++ {
    m += 1
  }
 }
 for i := 0; i < n; i++ {
  for k := 0; k < n; k++ {
     m += 1
  }
 }
 return m
}