how to make i/o fast in c++

Fast I/O in C++

#include <iostream>
#include <cstdio>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    // Your code here

    return 0;
}

Explanation: 1. Include Necessary Headers: Include the <iostream> and <cstdio> headers for input/output operations. 2. Disable Synchronization: Use ios_base::sync_with_stdio(false) to turn off the synchronization between C and C++ standard streams, which can improve performance. 3. Tie Input/Output: Use cin.tie(NULL) to untie the cin stream from the cout stream, which can also improve performance by preventing unnecessary flushing of the output buffer.