#include <bits/stdc++.h>

using namespace std;

string toString(int x) {
    if (x < 10) {
        return string() + (char) (x + '0');
    }
    return "10";
}

int main() {
    for (int i = 1; i <= 10; i++) {
        ifstream input("input" + toString(i) + ".txt");
        ofstream output("output" + toString(i) + ".txt");

        int x;
        input >> x;
        output << x << endl;

        input.close();
        output.close();
    }
}