提交时间:2021-05-22 18:18:30
运行 ID: 139
#include <iostream> #include <cstdio> #include <cmath> using namespace std; int main(){ char n; cin>>n; cout<<" "<<n<<endl; cout<<" "<<n<<n<<n<<endl; cout<<n<<n<<n<<n<<n<<endl; return 0; }