2021年CCCC天梯赛

L1���拟+字符串操作，L2读题+简单数据结构，L3题太长没耐心（

L1-1

#include using namespace std;int main(){    puts("To iterate is human, to recurse pine.");}

L1-2

#include using namespace std;int main(){    int a,b,c; cin>>a>>b>>c;    cout    string s; cins;    if(s.size() == 6) {        cout        int a = stoi(s.substr(0,2));        if(a