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.