4889. 안정적인 문자열

c
#include  <bits/stdc++.h>

using namespace std;

int main(){
    cin.tie(NULL);
    cout.tie(NULL);
    ios_base::sync_with_stdio(false);

    int i = 0;
    string S;

    while(getline(cin, S)){
        i++;
    }

    cout << i << "\n";

    return 0;
}