hdu 1159 Common Subsequence

Common Subsequence

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string s1,s2;
	while(cin>>s1>>s2){
		int l1=s1.size(),l2=s2.size();
		vector<vector<int>> dp(l1+1,vector<int>(l2+1,0));
		for(int i=1;i<=l1;++i){
			for(int j=1;j<=l2;++j){
				if(s1[i-1]==s2[j-1])
					dp[i][j]=dp[i-1][j-1]+1;
				else dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
			}
		}
		printf("%d\n",dp[l1][l2]);
	}
	return 0;
}