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atcoder-study

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ABC_174_D.py

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5 lines (5 loc) · 91 Bytes

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atcoder-study

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ABC_174_D.py

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5 lines (5 loc) · 91 Bytes

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n = int(input())

wr = input()

R_cnt = wr.count('R')

ans = wr.count('W',0,R_cnt)

print(ans)

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