백준 1152번 C++

#include <iostream>
#include <string>

using namespace std;
string s;
int answer = 0;
int main() {
	getline(cin, s);

	int index = 0;
	while (index < s.length()) {
		if (s[index] == ' ')
			answer++;
		index++;
	}
	if (s[0] == ' ')
		answer--;
	if (s[s.length() - 1] == ' ')
		answer--;
	cout << answer+1 << endl;
	return 0;
}