include <bits/stdc++.h>

include

include

using namespace std;

int main() {

queue<int> d, x;
int n;
cin >> n;
for (int k = 0; k < n; k++) {
	int a, b;
	cin >> a >> b;
	d.push(a);
	x.push(b);
}
int ch2;
cin >> ch2;
vector<int> ch;
int l = 0;
while (1) {
	cout << d.front() << " " << l << endl;
	while (ch.size() < ch2 && d.front() <= l) {
		ch.push_back(x.front());
		x.pop();
		d.pop();
	}
	for (int k = 0; k < ch2; k++) {
		ch[k]--;
		if (ch[k] == 0) {
			ch.erase(ch.begin() + k);
		}
		cout << k << " " << ch.size() << endl;
		int n = ch.size() - 1;
		cout << n << " ";
		if (k >= n) {
			cout << "1111";
			break;
		}
	}
	l++;
	cout << l << " " << ch.size() << " " << x.size() << endl;
	if (ch.size() < ch2) {
		cout << "can push" << ch2 - ch.size() << endl;
	}
	if (ch.empty() && x.empty()) {
		break;
	}
}
cout << l;
return 0;

}