摘要:
数论 \(exgcd : a * x + b * y = gcd(a, b), 输出 : x, y, gcd(a, b)\) LL gcd(LL a, LL b) { return (b == 0) ? a : gcd(b, a % b); } LL lcm(LL a, LL b) { return 阅读全文
摘要:
常见问题 ssh: connect to host 192.168.199.142 port 22: Connection timed out systemctl status sshd # 查看ssh服务状态 systemctl start sshd # 启动ssh服务 systemctl sto 阅读全文