#import pdb; pdb.set_trace()
import sys
import math

def main():
    
    (n, k) = map(int, raw_input().split())
    d = map(int, raw_input().split())
    
    count = 0
    j = 0
    for i in range(n):
        tmpd = d[j]
        if tmpd - 1 != j:
            tmpe = d[tmpd - 1]
            d[tmpd - 1] = tmpd
            d[j] = tmpe
            
            count += 1
        else:
            j += 1
    
    while k > count:
        count += 2
        
    if k == count:
        print "YES"
    else:
        print "NO"
        
        
if __name__ == '__main__':
    main()