Problem: Notes

Template in C

Constraints

* 1 ≤ n ≤ 100000
* 1 ≤ q ≤ 1000
* 1 ≤ timei ≤ 50000
* 1 ≤ length of namei ≤ 10
* 1 ≤ Sum of timei ≤ 1000000

Input

n q
name1 time1
name2 time2
...
namen timen


In the first line the number of processes n and the quantum q are given separated by a single space.

In the following n lines, names and times for the n processes are given. namei and timei are separated by a single space.

Output

For each process, prints its name and the time the process finished in order.

Example

Input

5 100
p1 150
p2 80
p3 200
p4 350
p5 20


Output

p2 180
p5 400
p1 450
p3 550
p4 800

Solution (in CPP):

Solution:
#include <iostream>
#include <queue>
#include <string>

using namespace std;

int main() {

	int n, q, t;
	string name;
	queue<pair<string, int> > Q;

	cin >> n >> q;

	for (int i = 0; i < n; i++) {
		cin >> name >> t;
		Q.push(make_pair(name, t));
	}
	pair<string, int> u;
	int elaps = 0;
	int a = 0;

	while (!Q.empty()) {
		u = Q.front();
		Q.pop();
		a = min(u.second, q);
		u.second -= a;
		elaps += a;
		if (u.second > 0) {
			Q.push(u);
		} else {
			cout << u.first << " " << elaps << endl;
		}
	}
	return 0;
}