python/RuMenJingDian/Others/page_29.cpp

#include <bits/stdc++.h>

using namespace std;

int main() {
    //读入输出优化的强迫症
    ios::sync_with_stdio(false);
    //参数输入
    freopen("../input.txt", "r", stdin);
    //结果输出
    freopen("../output.txt", "w", stdout);

    int x;
    cin >> x;
    cout << x << endl;
    return 0;
}