549. Dumbbells
Time limit per test: 1
second(s)
Memory limit: 262144
kilobytes
input: standard
output: standard
A sports shop has
n dumbbells in store. Each of them is characterised by its mass
m_{i} and cost
c_{i}. Recently the shop manager faced the following nontrivial problem. He has to find the maximum number of sports sets that satisfy the following requirements:
 each set must contain exactly k dumbbells;
 each set must have dumbbells of k distinct masses;
 for each pair of sets the masses of dumbbells must coincide , that is, the masses in the sets must be equal as .
The manager's task is to make the maximum number of such sets. If there are several ways to make the maximum possible number of sets, he should choose the one that has the maximum total cost of dumbbells that are contained in the chosen sets. Note that the primary goal is to maximize the number of sets and maximization of the total cost is the secondary goal.
Input
The first line of the input contains integers
n and
k (1 ≤
n,
k ≤ 4000). Next
n lines contain descriptions of the dumbbells, one per line. Each description consists of a pair of integers
m_{i},
c_{i} (1 ≤
m_{i},
c_{i} ≤ 4000),
m_{i} is the mass of the
ith dumbbell, and
c_{i} is its cost.
Output
In the only output line print two integers —
t and
s, where
t is the maximum number of sets, and
s is the maximum total cost of dumbbells in
t choosen sets. If the manager can't make at least one set, print a pair of zeroes.
Example(s)
sample input

sample output

7 2
16 1
4 6
16 7
7 100
32 9
4 6
32 1

2 22

sample input

sample output

4 2
1 2
2 1
4 3
1 7

1 10

Note
In the first sample the manager should make two sets. One of the possible solutions is as follows: the first set contains the second and the seventh dumbbells, the second set contains the fifth and the sixth dumbbells.
In the second sample the manager can make only one set. It consists of the third and the fourth dumbbells.