#include<bits/stdc++.h> using namespace std; using ll = long long ; using pii = pair<ll , ll> ; using i3 = tuple<ll , ll , ll> ; const int MOD = 1e9+7 , N = 1e9 ; int n , m , cnt , ans ; bitset<N> vis ; int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cin >> n >> m ; for(int i=1;i<=m;i++){ int x ; cin >> x ; for(int j=1;j<=x;j++){ int width ; cin >> width ; for(int now = n - width + 1 ; now <= width ; now++){ if(!vis[now]){ ans++ ; //cout << "block = " << now << " i = " << i << "\n" ; } vis[now] = true ; } } } //cout << "\n" ; cout << ans ; }