import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int q = sc.nextInt();
        ArrayList<Long> order = new ArrayList<>();
        ArrayList<Long> current = new ArrayList<>();
        current.add(Long.MIN_VALUE);
        current.add(Long.MAX_VALUE);
        long added = 0;
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < q; i++) {
            int t = sc.nextInt();
            int x = sc.nextInt();
            if (t == 1) {
                int left = 0;
                int right = current.size() - 1;
                long y = x - added;
                while (right - left > 1) {
                    int m = (left + right) / 2;
                    if (current.get(m) <= y) {
                        left = m;
                    } else {
                        right = m;
                    }
                }
                current.add(right, y);
                order.add(y);
            } else if (t == 2) {
                current.remove(order.get(x - 1));
            } else {
                added += x;
            }
            int left = 0;
            int right = current.size() - 1;
            while(right - left > 1) {
                int m = (left + right) / 2;
                if (current.get(m) + added >= current.size() - m - 1) {
                    right = m;
                } else {
                    left = m;
                }
            }
            sb.append(current.size() - right - 1).append("\n");
        }
        System.out.print(sb);
    }
}