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 PYTHON3):

Solution:
from collections import deque

n, q = map(int, input().split())
d = deque([input().split() for _ in range(n)])
a = []
tt = 0

while d:
    t = int(d[0][1])
    if t > q:
        tt += q
        d.append([d[0][0], str(t-q)])
        d.popleft()
    else:
        tt += t
        p = d.popleft()
        a.append([p[0], tt])

for n, t in a:
    print(n, t)