# import sys # for line in sys.stdin: # a = line.split() # print(int(a[0]) + int(a[1])) n=int(input()) m=int(input()) lst=list(map(int,input().split())) ary=[i for i in range(1,n+1)] res=set(ary)-set(lst) if len(res)==1 and sorted(lst)==lst: print("Yes") temp=list(res) print(temp[0]) else:...