#include <iostream>
#include <string>

using namespace std;

bool isDigit(char c);

int isRight(string s);

int main()
{
    string IP;
    cin >> IP;
    cout << isRight(IP);
    return 0;
}

bool isDigit(char c)
{
    return '0' <= c && c <= '9';
}
int isRight(string s)
{
    int len = s.size();
    if (s[0] == '.') return 0;
    else if (s[len - 1] == '.') return 0;
    for (int i = 1; i < len - 1; i++)
    {
        if (s[i] == '.' && s[i + 1] == '.') return 0;
    }
    return 1;
}