POJ 1458 Common Subsequence-dp-(最长公共子序列模型)

题意:裸最长公共子序列

分析:

直接套用模型,注意初始化和实现的是细节

代码:

#include<iostream>
#include<string>
#include<algorithm>
#define max(a,b) a>b?a:b
using namespace std;
int dp[1010][1010];
string a,b;
int main()
{
	while(cin>>a>>b){
		for(int i=0;i<a.length();i++) dp[i][0]=0;
		for(int i=0;i<b.length();i++) dp[0][i]=0;
		for(int i=1;i<=a.length();i++){
			for(int j=1;j<=b.length();j++){
				if(a[i-1]==b[j-1]) dp[i][j]=dp[i-1][j-1]+1;
				else dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
			}
		}
		cout<<dp[a.length()][b.length()]<<endl;
	}
}

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时间: 2024-12-30 03:10:15

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