作者cai7773 (蓄勢待發)
看板CSSE
標題Re: [問題] 未排序的陣列，演算法相關問題
時間Fri Jun 11 01:55:46 2010
Algorithm :
Assume m >= n
Sort array X[1:m] and Y[1:n] Time complexity = O( log m )
For each i = 1:m,
Find d-X[i] in array Y using bisection method
Time complexity = O( m*log n)
Total Time complexity = O( m * log n)
※ 引述《mqazz1 (無法顯示)》之銘言：
: given two unsorted arrays X and Y,
: each contains m and n numbers, separately.
: design an algorithm so that,
: given a number d,
: it could determine if there exists two integers i and j,
: such that X[i] + Y[i] = d
: use less than O(m*n) running time
: 我想請問這題大致上從哪方面下手會比較簡易
: 謝謝
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