提交时间:2026-01-15 10:52:45

运行 ID: 82482

#include<iostream> using namespace std; int main(){ string s1,s2,s; int n=0; getline(cin,s1); getline(cin,s2); s2=s2+s1; cout<<s2<<endl; while(getline(cin,s)){ cout<<s[s.size()-1]; ++n; } cout<<'\n'<<2+n; return 0; }