3. 对count做前缀和，得到每个值的最终位置
Рублев проиграл в полуфинале турнира в ДубаеРоссийский теннисист Рублев проиграл в полуфинале турнира в Дубае
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The civil rights leader, who ran for president twice in the 1980s, leaves a lasting legacy.
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