#include "fstream"
using namespace std;
ofstream ofs;
ofs.open("debug.txt", ios::app);
streambuf* sbuf = ofs.rdbuf();
cout.rdbuf(sbuf);
#include "fstream"
using namespace std;
ofstream ofs;
ofs.open("debug.txt", ios::app);
streambuf* sbuf = ofs.rdbuf();
cout.rdbuf(sbuf);