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[AtCoder]ABC-297|B - chess960
設問ページ
提出結果
def getString():
return input()
def main():
s = getString()
r = False
if s.find('B') % 2 != s.rfind('B') % 2 and s.find('R') < s.find('K') < s.rfind('R'):
r = True
print('Yes' if r else 'No')
if __name__ == "__main__":
main()
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