PAT 1105 Spiral Matrix

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1105 Spiral Matrix(25 分)

This time your job is to fill a sequence of N positive integers into a spiral matrix in non-increasing order. A spiral matrix is filled in from the first element at the upper-left corner, then move in a clockwise spiral. The matrix has mrows and n columns, where m and n satisfy the following: m×n must be equal to N; mn; and m?n is the minimum of all the possible values.

Input Specification:

Each input file contains one test case. For each case, the first line gives a positive integer N. Then the next line contains N positive integers to be filled into the spiral matrix. All the numbers are no more than 10?4??. The numbers in a line are separated by spaces.

Output Specification:

For each test case, output the resulting matrix in m lines, each contains n numbers. There must be exactly 1 space between two adjacent numbers, and no extra space at the end of each line.

Sample Input:

12
37 76 20 98 76 42 53 95 60 81 58 93

Sample Output:

98 95 93
42 37 81
53 20 76
58 60 76

 题目大意:输入一个数N,并且有N个数,给出一个非递增的螺旋矩阵,m是行,n是列,m*n=N,要求m>=n,并且在所有可能的取值中,m-n的值最小。

 //1.首先就需要对N进行因式分解,确定m和n。2.其次就放就可以了。

//N的范围没给。 

 

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