http://poj.org/problem?id=2132 //* @author:alpc12 import java.io.*; import java.util.*; import java.math.*; public class Main { static int N = 26; int n; int M; int[][] adj = new int[26][26]; boolean[] chk = new boolean[26]; boolean DFS(int K, int m) { chk[m] = true; if(m == 1) return true; int i; for(i = 0; i < n; ++i) if(!chk[i]) if(adj[m][i]!=0 && adj[m][i] % K == 0) if(DFS(K, i)) return true; return false; } BigInteger GCD(BigInteger x, BigInteger y) { if(x.compareTo(y) < 0) return GCD(y, x); while(y.compareTo(BigInteger.ZERO) > 0) { BigInteger tmp = y; y = x.mod(y); x = tmp; } return x; } BigInteger LCM(BigInteger x, BigInteger y) { BigInteger ret = x.multiply(y); ret = ret.divide(GCD(x, y)); return ret; } void run() { Scanner cin = new Scanner(System.in); n = cin.nextInt(); int i, j; M = 0; for(i = 0; i < n; ++i) for(j = 0; j < n; ++j) { adj[i][j] = cin.nextInt(); if(adj[i][j] > M) M = adj[i][j]; } BigInteger ans = new BigInteger("1"); for(i = 1; i <= M; ++i) { for(j = 0; j < n; ++j) chk[j] = false; if(DFS(i, 0)) { // System.out.println(i + " " + ans); ans = LCM(ans, new BigInteger(""+i)); } } System.out.println(ans); } public static void main(String[] args) { new Main().run(); } }
Meta
-
Recent Posts
Recent Comments
- MorrissUnime on 隆宪叁年-五一
- bngvhmxrsj on 隆宪叁年-五一
- bngvjbansj on 隆宪叁年-五一
- bngvgffiij on 隆宪叁年-五一
- MorrissUnime on 隆宪叁年-五一
Archives
- May 2024
- April 2023
- February 2023
- January 2023
- December 2022
- November 2022
- September 2022
- June 2022
- July 2021
- January 2021
- February 2020
- September 2019
- March 2018
- February 2018
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- September 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- June 2009
- May 2009
- April 2009
- March 2009
- February 2009
Categories