fast input and output c++
#include <iostream>
#include <ios>
int main() {
// To improve input/output speed
std::ios_base::sync_with_stdio(false);
std::cin.tie(nullptr);
// Read input
int n;
std::cin >> n;
// Process input
for (int i = 0; i < n; ++i) {
int x;
std::cin >> x;
// Perform operations with x
// Print output
std::cout << x << " ";
}
// Ensure that the output is flushed
std::cout << std::endl;
return 0;
}