What Will Be The Time Complexity Of The Given Codep Pre Langc #1148

 #include <stdio.h> #include <string.h> #include<iostream> using namespace std; void swap(char *x, char *y) { char temp; temp = *x; *x = *y; *y = temp; }  void func(char *a, int l, int r) { int i; if (l == r) cout<<a<<” ,”; else { for (i = l; i <= r; i++) { swap((a+l), (a+i)); func(a, l+1, r); swap((a+l), (a+i)); } } }  int main() { char str[] = "AB"; int n = strlen(str); func(str, 0, n-1); return 0; }