increase the speed of cin and cout in c 2b 2b

1#include <iostream>
2
3int main(int argc, char **argv) {
4
5  int parity = 0;
6  int x;
7//you can use scanf , printf alternatively for speed
8  std::ios::sync_with_stdio(false);// this increases the speed of i/o
9
10  while (std::cin >> x)
11    parity ^= x;
12  std::cout << parity << std::endl;
13
14  return 0;
15}