import subprocess
import sys
from pathlib import Path

cases = [{'input': '3 3\n><>\nv^v\n', 'output': 'NO\n'}, {'input': '4 6\n<><>\nv^v^v^\n', 'output': 'YES\n'}, {'input': '2 2\n<>\nv^\n', 'output': 'YES\n'}, {'input': '2 2\n>>\n^v\n', 'output': 'NO\n'}, {'input': '3 3\n>><\n^^v\n', 'output': 'YES\n'}, {'input': '3 4\n>><\n^v^v\n', 'output': 'YES\n'}, {'input': '3 8\n>><\nv^^^^^^^\n', 'output': 'NO\n'}, {'input': '7 2\n<><<<<>\n^^\n', 'output': 'NO\n'}, {'input': '4 5\n><<<\n^^^^v\n', 'output': 'YES\n'}, {'input': '2 20\n><\n^v^^v^^v^^^v^vv^vv^^\n', 'output': 'NO\n'}, {'input': '2 20\n<>\nv^vv^v^^vvv^^^v^vvv^\n', 'output': 'YES\n'}, {'input': '20 2\n<><<><<>><<<>><><<<<\n^^\n', 'output': 'NO\n'}, {'input': '20 2\n><>><>><>><<<><<><><\n^v\n', 'output': 'YES\n'}, {'input': '11 12\n><<<><><<>>\nvv^^^^vvvvv^\n', 'output': 'NO\n'}, {'input': '4 18\n<<>>\nv^v^v^^vvvv^v^^vv^\n', 'output': 'YES\n'}, {'input': '16 11\n<<<<>><><<<<<><<\nvv^v^vvvv^v\n', 'output': 'NO\n'}, {'input': '14 7\n><<<<>>>>>>><<\nvv^^^vv\n', 'output': 'NO\n'}, {'input': '5 14\n<<><>\nv^vv^^vv^v^^^v\n', 'output': 'NO\n'}, {'input': '8 18\n>>>><>>>\nv^vv^v^^^^^vvv^^vv\n', 'output': 'NO\n'}, {'input': '18 18\n<<><>><<>><>><><<<\n^^v^v^vvvv^v^vv^vv\n', 'output': 'NO\n'}]
solution = Path(__file__).with_name("solution.py")
for index, case in enumerate(cases):
    proc = subprocess.run(
        [sys.executable, str(solution)],
        input=case["input"],
        text=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        timeout=10,
    )
    if proc.returncode != 0:
        raise AssertionError(f"case {index} exited {proc.returncode}: {proc.stderr}")
    got = proc.stdout.strip()
    expected = case["output"].strip()
    if got.split() != expected.split():
        raise AssertionError(
            f"case {index} output mismatch\nexpected={expected!r}\ngot={got!r}\nstderr={proc.stderr}"
        )
print('deepcoder_primeintellect_io')