문제
풀이
#include <iostream>
#include <string>
#include <vector>
using namespace std;
void solve(void) {
int n; cin >> n;
vector<vector<string>> v(n);
for (int i=0; i<n; i++) {
int d; cin >> d;
for (int j=0; j<d; j++) {
string s; cin >> s;
v[i].push_back(s);
}
}
cout << v[0].size() << "\n";
for (int i=0; i<v[0].size(); i++) {
cout << v[0][i] << "\n";
}
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}