题意:有两堆n张的卡片,每张卡片有一个得分,Alice和Bob轮流在两堆卡片的两端取卡片
问Alice先手,取得分数最多为多少;
#include <stdio.h> #include <iostream> #include <algorithm> #include <string.h> #include <queue> #include <math.h> #define M 50 #define LL long long using namespace std; int n; int dp[M][M][M][M]; int x[M],y[M],sum1[M],sum2[M]; int dfs(int a,int b,int c,int d) { if(dp[a][b][c][d]) return dp[a][b][c][d]; if(a>b&&c>d) return 0; int ans1=0,ans2=0; if(a<=b) { ans1=max(x[a]+dfs(a+1,b,c,d),x[b]+dfs(a,b-1,c,d)); } if(c<=d) { ans2=max(y[c]+dfs(a,b,c+1,d),y[d]+dfs(a,b,c,d-1)); } return dp[a][b][c][d]=sum1[b]-sum1[a-1]+sum2[d]-sum2[c-1]-max(ans1,ans2); } int main() { int t; scanf("%d",&t); while(t--) { scanf("%d",&n); memset(dp,0,sizeof(dp)); sum1[0]=0;sum2[0]=0; for(int i=1;i<=n;i++) { scanf("%d",&x[i]); sum1[i]=sum1[i-1]+x[i]; } for(int i=1;i<=n;i++) { scanf("%d",&y[i]); sum2[i]=sum2[i-1]+y[i]; } printf("%d\n",sum1[n]+sum2[n]-dfs(1,n,1,n)); } return 0; }
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原文地址:http://blog.csdn.net/u012861385/article/details/35839399