[HackerEarth] Surya and his girl fiend went on a date during this weekend. There is a sequence of numbers from 1 to 1000000 on a table. Surya picked up a sub sequence SS from it and wants his girl fri - 题解

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题目信息
题号 P15828
标题 [HackerEarth] Surya and his girl fiend went on a date during this weekend. There is a sequence of numbers from 1 to 1000000 on a table. Surya picked up a sub sequence SS from it and wants his girl fri
难度 普及
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