New Year and North Pole

750B1300· pupil2s256 MB⌨ stdin/stdout

Sample 1of 6

Input

5
7500 South
10000 East
3500 North
4444 West
4000 North

Output

YES

Sample 2of 6

Input

2
15000 South
4000 East

Output

NO

Sample 3of 6

Input

5
20000 South
1000 North
1000000 West
9000 North
10000 North

Output

YES

Sample 4of 6

Input

3
20000 South
10 East
20000 North

Output

NO

Sample 5of 6

Input

2
1000 North
1000 South

Output

NO

Sample 6of 6

Input

4
50 South
50 North
15000 South
15000 North

Output

YES

750B.cpp

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Ln 11·137 BGNU C++20 (64)