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/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/
#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    long long k,n; 
    cin >> k >> n;

    vector<int> p(n,1);

    int il = n;


    for(int i = 0; i < k; i++){
        int n2; 
        cin >> n2;
        vector<int> c(n2,0);
        for(int x = 0; x < n2; x++){
            int a;
            cin >> a;

            if(a == 0){
                il++;
                c[x]=1;
            }
            else{
                if(p[a-1] > 0){
                    p[a]--;   
                    c[x]=1;
                }
                else{
                    il++; 
                    c[x]=1;
                }
            }
        }
        p=c;
    }

    cout << il << endl;
}