C++ 알고리즘 - 백준 25192 인사성 밝은 곰곰이

https://www.acmicpc.net/problem/25192

 

#include <bits/stdc++.h>
#include <unordered_map>
using namespace std;

void CPP_INIT() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
}

int main(void) {
	CPP_INIT();

    int input1;
    string str;
    int cnt = 0;
    unordered_map<string, int> um;

    cin >> input1;

    for(int i = 0; i < input1; i++){
        cin >> str;
        if(str == "ENTER"){
            cnt += um.size();
            um = {};            
            continue;
        }

        um.insert({str, 1});
    }

    cnt += um.size();
    cout << cnt;
    
    return 0;
}