func_code_string: #include <bits/stdc++.h>   using namespace std;   int dx[] = {-1, 0, 0, 1};   int dy[] = {0, -1, 1, 0};   int dx1[] = {-1, -1, -1, 0, 0, 0, 1, 1, 1};   int dy1[] = {-1, 0, 1, -1, 0, 1, -1, 0, 1};   const double eps = 1e-9;   const int inf = 2000000000;   const long long int infLL = 9000000000000000000;   const long long int MOD = 1e+7;   const double PI = 3.141592653589793238462643383279;   int main() {     ios_base ::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n, m;     cin >> n >> m;     int ans = 2 * n - m + 1;     for (long long int i = 0; i < m; i++) {       int k;       cin >> k;       for (long long int j = 0; j < k; j++) {         int a;         cin >> a;         if (a == j + 1) ans -= 2;       }     }     cout << ans << endl;     return 0;   }   