reverse(str.begin(), str.end())
str1 == str2
str1.compare(str2)
같으면 0 리턴
다르면 -1 리턴
stoi()
to_string()
#include <vector>
#include <sstream>
using namespace std;
int main()
{
string input, temp;
vector<string> v;
stringstream ss;
getline(cin, input);
ss(input);
while(ss >> temp) {
v.push_back(temp);
}
return 0;
}