Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
from itertools import accumulate
import numpy as np
MOD = 1000000007  # type: int


def solve(N: int, s: str):

    # DP[i][j]はi文字目までをみたす順列のうち、最後がjで終わるものの個数
    DP = np.zeros((N, N+1), dtype=np.int64)
    # DP = [[0]*(N+1) for _ in range(N)]
    DP[0][1] = 1

    for i in range(1, N):
        acc = list(accumulate(DP[i-1]))
        for j in range(1, (i+1)+1):
            if s[i-1] == "<":
                DP[i][j] = acc[j-1]
            else:
                DP[i][j] = acc[i+1] - acc[j-1]
            DP[i][j] %= MOD

    print(sum(DP[N-1]) % MOD)
    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    s = next(tokens)  # type: str
    solve(N, s)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
from itertools import accumulate
INF = float("inf")

MOD = 1000000007  # type: int


def solve(N: int, s: str):

    # DP[i][j]はi文字目までをみたす順列のうち、最後がjで終わるものの個数
    DP = [[0]*(N+1) for _ in range(N)]
    DP[0][1] = 1

    for i in range(1, N):
        acc = list(accumulate(DP[i-1]))
        for j in range(1, (i+1)+1):
            if s[i-1] == "<":
                DP[i][j] = acc[j-1]
            else:
                DP[i][j] = acc[i+1] - acc[j-1]
            DP[i][j] %= MOD

    print(sum(DP[N-1]) % MOD)
    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    s = next(tokens)  # type: str
    solve(N, s)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
from itertools import accumulate
INF = float("inf")

MOD = 1000000007  # type: int


def solve(N: int, s: str):

    # DP[i][j]はi文字目までをみたす順列のうち、最後がjで終わるものの個数
    DP = [[0]*(N+1) for _ in range(N)]
    DP[0][1] = 1

    for i in range(1, N):
        tot = 0
        acc = list(accumulate(DP[i-1]))
        for j in range(1, (i+1)+1):
            if s[i-1] == "<":
                DP[i][j] = acc[j-1]
            else:
                DP[i][j] = acc[i+1] - acc[j-1]
            DP[i][j] %= MOD

    print(sum(DP[N-1]) % MOD)
    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    s = next(tokens)  # type: str
    solve(N, s)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
from itertools import accumulate
INF = float("inf")

MOD = 1000000007  # type: int


def solve(N: int, s: str):

    # DP[i][j]はi文字目までをみたす順列のうち、最後がjで終わるものの個数
    DP = [[0]*(N+1) for _ in range(N)]
    DP[0][1] = 1

    for i in range(1, N):
        acc = list(accumulate(DP[i-1]))
        for j in range(1, (i+1)+1):
            if s[i-1] == "<":
                DP[i][j] = acc[j-1]
            else:
                DP[i][j] = acc[i+1] - acc[j-1]
            DP[i][j] %= MOD

    print(sum(DP[N-1]) % MOD)
    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    s = next(tokens)  # type: str
    solve(N, s)


if __name__ == '__main__':
    main()