#include <iostream>
#include <cstdio>
#include<string.h>
#include<algorithm>
#include<vector>
#include<functional>
using namespace std;

char C[1000010];
int num = 0, n;

int main(void) {
	cin.getline(C,1000010);
	n = strlen(C);
	for (int i = 0; i < n; i++) {
		if (C[i] == ' '&& i == 0) {

		}
		else if (C[i] == ' '&& i == n - 1) {

		}
		else if (C[i] == ' ') {
			num++;
		}
	}
	if(n!=1 && n!=0 ) num++;
	cout << num;

}