eachline.cc

#include <iostream>
using namespace std;
int main() {
    // See: https://www.quora.com/Is-cin-cout-slower-than-scanf-printf/answer/Anders-Kaseorg
    ios::sync_with_stdio(false);
    string line;
    while (cin) {
        getline(cin, line);
        cout << line << "\n"; // endl is worse as it flushes, but makes not much difference
    }
    return 0;
}