C++ Specifics

Compiling

g++ a.cpp // compile the cpp file

A .exe file will be generated in the directory for execution. One needs to compile a c++ file every time before running it! No updates of the code will be reflected otherwise!

Executing

a.exe in terminal.

Fast I/O

cin.tie(0) -> sync_with_stdio(0);

General Template

#include "bits/stdc++.h"
using namespace std;

int main(){
    cin.tie(0) -> sync_with_stdio(0);
    // ...
}