A. Minimum Integer
									time limit per test：1 second
								memory limit per test：256 megabytes
										input：standard input
									   output：standard output

You are given qq queries in the following form:
Given three integers lili, riri and didi, find minimum positive integer xixi such that it is divisible by didi and it does not belong to the segment [li,ri].
Can you answer all the queries?
Recall that a number x belongs to segment [l,r] if l≤x≤r.
Input

Then qq lines follow, each containing a query given in the format lili riri didi (1≤li≤ri≤109, 1≤di≤109). li, ri and di are integers.

Output
For each query print one integer: the answer to this query.

Example

input
5
2 4 2
5 10 4
3 10 1
1 2 3
4 6 5

output
6
4
1
3
10

#include<iostream>
using namespace std;
int main()
{
	long long int n,x,y,z,t1,t2,t3;
	cin>>n;
	while(n--)
	{
		cin>>x>>y>>z;
		t1=x/z;
		t3=x%z;
		t2=y/z;
		if(t1<1)
		{
			cout<<(t2+1)*z<<endl;
		}
		else
		{
			if(t1==1&&t3==0)
				cout<<(t2+1)*z<<endl;
			else
				cout<<z<<endl;
		}
	}
	return 0;
}
 

測試樣例：

Test: #1
Input
5
2 4 2
5 10 4
3 10 1
1 2 3
4 6 5
Output
6
4
1
3
10
Test: #2
Input
5
1 1000000000 1
1 1000000000 1000000000
2 1000000000 1
1 999999999 1000000000
5 6 5
Output
1000000001
2000000000
1
1000000000
10