atcoderDP/LCS.java at master · KTong821/atcoderDP · GitHub

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importjava.util.*;
importjava.io.*;

publicclassLCS {

publicstaticStrings, t;
publicstaticint[][] dp;

publicstaticStringrecurse(inti, intj) {
if (dp[i][j] == 0)
return"";
if (s.charAt(i-1) == t.charAt(j-1))
returnrecurse(i - 1, j - 1) + s.charAt(i-1);
elseif (dp[i - 1][j] > dp[i][j - 1])
returnrecurse(i - 1, j);
else
returnrecurse(i, j - 1);

	}

publicstaticvoidmain(String[] args) throwsIOException {
BufferedReaderbr = newBufferedReader(newInputStreamReader(System.in));
s = br.readLine();
t = br.readLine();

dp = newint[s.length() + 1][t.length() + 1];
for (inti = 1; i <= s.length(); i++) {
for (intj = 1; j <= t.length(); j++) {
if (s.charAt(i-1) == t.charAt(j-1))
dp[i][j] = dp[i - 1][j - 1] + 1;
else
dp[i][j] = Math.max(dp[i - 1][j], dp[i][j - 1]);
 }
 }
System.out.println(recurse(s.length(), t.length()));
	}

}