atcoder#CODEFESTIVAL2017QUALBB. Problem Set
Problem Set
Score : points
Problem Statement
Rng is preparing a problem set for a qualification round of CODEFESTIVAL.
He has candidates of problems. The difficulty of the -th candidate is .
There must be problems in the problem set, and the difficulty of the -th problem must be . Here, one candidate of a problem cannot be used as multiple problems.
Determine whether Rng can complete the problem set without creating new candidates of problems.
Constraints
- All numbers in the input are integers.
Partial Score
- points will be awarded for passing the test set satisfying and .
Input
Input is given from Standard Input in the following format:
Output
Print YES
if Rng can complete the problem set without creating new candidates of problems; print NO
if he cannot.
5
3 1 4 1 5
3
5 4 3
YES
7
100 200 500 700 1200 1600 2000
6
100 200 500 700 1600 1600
NO
Not enough s.
1
800
5
100 100 100 100 100
NO
15
1 2 2 3 3 3 4 4 4 4 5 5 5 5 5
9
5 4 3 2 1 2 3 4 5
YES