# Problem B

Almennir Borgarar

Benni, an ardent competitive programmer (and hamburger enthusiast), is waiting in line with $m$ other contestants in front of him. How long will Benni have to wait if the chefs utilize the grills optimally?

## Input

The first line of the input contains two integers $n$ ($1 \leq n \leq 2\cdot 10^5$), the number of grills, and $m$ ($0 \leq m \leq 10^9$), the number of contestants ahead of Benni in line.

Then there is a line with $n$ integers, $t_1, t_2, \ldots , t_ n$, where $t_ i$ ($1 \leq t_ i \leq 10^9$) is the number of seconds it takes the $i$-th grill to grill a burger.

## Output

Print the number of seconds Benni has to wait before he gets his burger, assuming the chefs utilize the grills optimally.

## Scoring

Group |
Points |
Constraints |

1 |
20 |
$n, m, t_ i \leq 100$ |

2 |
20 |
$n, m \leq 10^3$ |

3 |
20 |
$m, t_ i \leq 10^3$ |

4 |
10 |
$m \leq 10^5$ |

5 |
30 |
No further constraints |

Sample Input 1 | Sample Output 1 |
---|---|

2 6 1 2 |
5 |

Sample Input 2 | Sample Output 2 |
---|---|

3 10 2 7 5 |
14 |

Sample Input 3 | Sample Output 3 |
---|---|

4 6 10 120 25 30 |
50 |