Codeforces Round #540 (Div. 3)--C. Palindromic Matrix（構造題---迴文方陣的構造）

Palindromic Matrix 題目鏈接http://codeforces.com/problemset/problem/1118/C time limit per test:2 seconds memory limit per test:256 megabytes Let’s call some square matrix with integer values in its cells

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