29 lines
656 B
C++
29 lines
656 B
C++
#include<cstdio>
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#include<cstring>
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#include<algorithm>
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using namespace std;
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const int maxn=60;
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int n,f[maxn][maxn][2600],b[maxn],c[maxn];
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int dp(int i,int j,int k)
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{
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int &res=f[i][j][k];
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if(res) return res;
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if(i==j) return res=(c[i]+k)*(c[i]+k);
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res=dp(i,j-1,0)+(k+c[j])*(k+c[j]);
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for(int p=i;p<j;p++)
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if(b[p]==b[j]) res=max(res,dp(i,p,k+c[j])+dp(p+1,j-1,0));
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return res;
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}
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int main()
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{
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#ifdef local
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freopen("pro.in","r",stdin);
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#endif
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scanf("%d",&n);
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for(int i=1;i<=n;i++) scanf("%d",&b[i]);
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for(int i=1;i<=n;i++) scanf("%d",&c[i]);
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memset(f,0,sizeof(f));
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for(int i=1;i<=n;i++) f[i][i][0]=c[i]*c[i];
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printf("%d\n",dp(1,n,0));
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return 0;
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} |