delete pics to save space

2.11404.cpp

@@ -0,0 +1,64 @@
+#include<cstdio>
+#include<cstring>
+#include<string>
+#include<algorithm>
+using namespace std;
+const int maxn=1005;
+char s[maxn];
+int n,dp[maxn][maxn];
+string res[maxn][maxn];
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%s",s)==1)
+	{
+		n=strlen(s);
+		for(int len=1;len<=n;len++)
+			for(int L=0;L+len<=n;L++)
+			{
+				int R=L+len-1;
+				if(L==R)
+				{
+					dp[L][R]=1;
+					res[L][R]=s[L];
+				}
+				else
+				{
+					dp[L][R]=dp[L+1][R-1]+(s[L]==s[R]?2:0);
+					dp[L][R]=max(dp[L][R],dp[L+1][R]);
+					dp[L][R]=max(dp[L][R],dp[L][R-1]);
+					res[L][R]="{";
+					if(dp[L][R]==dp[L+1][R-1]+(s[L]==s[R]?2:0))
+					{
+						if(s[L]==s[R])
+							res[L][R]=s[L]+res[L+1][R-1]+s[R];
+						else
+							res[L][R]=res[L+1][R-1];
+					}
+					if(dp[L][R]==dp[L+1][R])
+						res[L][R]=min(res[L][R],res[L+1][R]);
+					if(dp[L][R]==dp[L][R-1])
+						res[L][R]=min(res[L][R],res[L][R-1]);
+				}
+//				printf("dp[%d][%d]=%d ",L,R,dp[L][R]);
+//				printf("res[%d][%d]=%s\n",L,R,res[L][R].c_str());
+			}
+		printf("%s\n",res[0][n-1].c_str());
+	}
+	return 0;
+}
+/*
+Sample Input
+aabbaabb
+computer
+abzla
+samhita
+
+Sample Output
+aabbaa
+c
+aba
+aha
+*/