This documentation is automatically generated by online-judge-tools/verification-helper
# verification-helper: PROBLEM https://atcoder.jp/contests/arc117/tasks/arc117_c
import sys
input = sys.stdin.readline
from Combination.LucasTheorem import LucasTheorem
def main():
value = {"B": 0, "W": 1, "R": 2}
ans = ["B", "W", "R"]
n = int(input())
s = input()[:-1]
lt = LucasTheorem(3)
res = 0
for i, si in enumerate(s):
res += lt.comb(n - 1, i) * value[si]
res %= 3
if n % 2 == 0:
res = (-res) % 3
print(ans[res])
if __name__ == '__main__':
main()
Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.12.4/x64/lib/python3.12/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/hostedtoolcache/Python/3.12.4/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/python.py", line 96, in bundle
raise NotImplementedError
NotImplementedError