http://poj.org/problem?id=1226 //* @author:alpc12 import java.math.*; import java.io.*; import java.util.*; class Main { public static void main(String[] args) throws Exception { new Main().run(); } private int n; private void run() throws Exception { Scanner cin = new Scanner(System.in); int ntc = cin.nextInt(),i,j,k; while(ntc-- != 0) { n = cin.nextInt(); StringBuffer[] s = new StringBuffer[n]; for(i = 0; i < n; ++i) { s[i] = new StringBuffer(cin.next()); } int max = 0; for(i = 0; i < s[0].length(); ++i) { for(j = i+1; j <= s[0].length(); ++j) { if(check(s,i,j)) { max = Math.max(max,j-i); } } } System.out.println(max); } } boolean check(StringBuffer s[], int x, int y) { int i; String pattern1 = s[0].toString().substring(x, y); String pattern2 = ""; for(i = pattern1.length()-1; i >= 0; --i) { pattern2 += pattern1.charAt(i); } for(i = 0; i < n; ++i) { if(s[i].toString().indexOf(pattern1) == -1 && s[i].toString().indexOf(pattern2) == -1) { return false; } } return true; } }
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