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OI-codes/tk.hustoj.com/1347/1347.cpp

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#include <bits/stdc++.h>
using namespace std;
int main() {
string s;
getline(cin, s);
vector<string> args;
stringstream ss;
ss << s;
while (ss >> s) {
args.push_back(s);
}
int count = 10;
if (args.size() >= 2) count = -atoi(args[1].c_str());
while (getline(cin, s)) {
if (count-- > 0) {
cout << s << endl;
}
}
return 0;
}