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history_source/信息学奥赛一本通/2.9.3.5.cpp

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+#include<cstdio>
+#define max(a,b) ((a)>(b)?(a):(b))
+int main()
+{
+	int t,n;
+	scanf("%d",&t);
+	int ans[t],a,dp1,dp2,dp3,dp4;
+	int money;
+	for(int i=0;i<t;i++)
+	{
+		scanf("%d",&n);
+		a=0;
+		dp1=dp2=dp3=dp4=0;
+		for(int j=0;j<n;j++)
+		{
+			scanf("%d",&money);
+			dp4=max(dp1,dp2)+money;
+			dp1=dp2;
+			dp2=dp3;
+			dp3=dp4;
+			if(dp4>a) a=dp4; 
+		}
+		ans[i]=a;
+	}
+	for(int i=0;i<t;i++) printf("%d\n",ans[i]);
+	return 0;
+}