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())
l = [input().split() for _ in range(n)]

d = deque()
for i in l:
    d.append((i[0],int(i[1])))
t = 0

while d:
    x = d.popleft()
    if x[1]<=q:
        print(x[0], t+x[1])
        t = t+x[1]
    else:
        t += q
        d.append((x[0],x[1]-q))