第二行 n 個正整數(shù)，代表給定的 n 個數(shù)。
對于 30% 的數(shù)據(jù)，n <= 100。
對于 60% 的數(shù)據(jù)，n?<= 1000。
對于另外 20% 的數(shù)據(jù)，K?<= 10。
對于 100% 的數(shù)據(jù)，1 <= n?<= 10^5,?1 <= K?<= 10^3，給定的 n 個數(shù)均不超過 10^8。
4 3 1 2 3 4
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