k番目に大きい数（Pythonの場合）

#! /user/local/bin/python

def compare_int(a,b):
	return b - a

flag=0
number=[0]

for line in open ('../data_d.txt','r'):
	if flag==0:
		line.split(" ")
		n = int(line[0])
		k= int(line[2])
		flag = 1
	else:
		if int(line)!=0:
			number.append(int(line))

number.sort(compare_int)

print number[k-1]