//Solution by Mikołaj Kołek

#include "bits/stdc++.h"
#define intin *istream_iterator<int>(cin)

using namespace std;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	int k = intin;
	vector<vector<int>> meetings(k);
	meetings[0] = vector<int>(intin);

	for(int i = 1; i < k; i++) {
		meetings[i] = vector<int>(intin);
		copy_n(istream_iterator<int>(cin), meetings[i].size(), meetings[i].begin());
	}
	
	int overflow = 0;
	vector<int> requirements(meetings[k - 1].size(), 1);
	for(int i = k - 1; i >= 0; i--) {
		vector<int> nextRequirements(i > 0 ? meetings[i - 1].size() : 0);
		
		for(int j = 0; j < meetings[i].size(); j++) {
			if(meetings[i][j] != 0)
				nextRequirements[meetings[i][j] - 1] += requirements[j];
			else
				overflow += requirements[j];
		}
		
		for(auto &nextReq : nextRequirements) {
			if(nextReq == 0) {
				nextReq = 1;
				
				if(overflow > 0)
					overflow--;
			}
		}
		
		requirements = nextRequirements;
	}	
	
	cout << overflow;
	
	return 0;
}