错误是：Runtime Error Aborted

#include <iostream>
#include <list>
#include <algorithm>
using namespace std;
int w[1007][1007];
list<int>l;
int main() {
	int n, x = 1;
	string s;
	while (cin >> n && n) {
		cout << "Scenario #" << x << endl;
		x++;
		for (int i = 1; i <= n; i++) {
			int num;
			cin >> num;
			w[i][0] = 1;
			for (int j = 1; j <= num; j++) {
				scanf("%d", &w[i][j]);
			}
		}
		int m;
		while (cin >> s) {
			if (s[0] == 'E') {
				cin >> m;
				list<int>::iterator iter;
				for (int i = 1; i <= n; i++) {
					if (w[i][w[i][0]] == m) {
						iter = find(l.begin(), l.end(), w[i][w[i][0] - 1]);
						w[i][0]++;
						if (iter != l.end()) {
							iter++;
							l.insert(iter, m);
						}
						else l.push_back(m);
						break;
					}
				}
			}
			else if (s[0] == 'D') {
				cout << l.front() << endl;
				l.pop_front();
			}
			else break;
		}
	}
	return 0;
}