#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <sstream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class Solution {
public:
    long long zeroFilledSubarray(vector<int>& nums);
};


long long Solution::zeroFilledSubarray(vector<int>& nums)
{
  return 0;
}

int main()
{
  vector <int> nums;
  int i;
  Solution s;

  while (cin >> i) nums.push_back(i);
  cout << s.zeroFilledSubarray(nums) << endl;
}