mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
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#include<cstdio>
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#include<cstring>
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using namespace std;
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#define MAX 2005
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#define inf 0xfffff
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#define max(a,b) ((a)>(b)?(a):(b))
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int T,MaxP,W;
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int APi[MAX],BPi[MAX],ASi[MAX],BSi[MAX];
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int dp[MAX][MAX];//dp[i][j]第i天持有j股的最大值
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//dp[i][j]=max{dp[i-1][j],max{dp[r][k]-APi[i]*(j-k)}(0<r<i-w,k<j),max{dp[r][k]+BPi[i]*(k-j)}(0<r<i-w,k>j)}
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struct node
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{
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int x;//存dp[i-w-1][k]+APi[i]*k或dp[i-w-1][k]+BPi[i]*k
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int p;//当前持股数
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} q[2005],temp;
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int front,back;
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int main()
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{
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int cas;
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scanf("%d",&cas);
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for(; cas--;)
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{
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scanf("%d%d%d",&T,&MaxP,&W);
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for(int i=1; i<=T; ++i)
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scanf("%d%d%d%d",APi+i,BPi+i,ASi+i,BSi+i);
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for(int i=0; i<=T; ++i)
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for(int j=0; j<=MaxP; ++j)
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dp[i][j]=-inf;
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for(int i=1; i<=W+1; ++i)
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for(int j=0; j<=ASi[i]; ++j)
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dp[i][j]=(-APi[i]*j);
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for(int i=2; i<=T; ++i)
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{
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for(int j=0; j<=MaxP; ++j)
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dp[i][j]=max(dp[i][j],dp[i-1][j]);
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if(i<=W+1) continue;
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//买入
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front=back=1;
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for(int j=0; j<=MaxP; ++j)
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{
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temp.p=j;
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temp.x=dp[i-W-1][j]+APi[i]*j;
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for(;front<back&&q[back-1].x<temp.x;--back);
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q[back++]=temp;
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for(;front<back&&q[front].p+ASi[i]<j;++front);
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dp[i][j]=max(dp[i][j],q[front].x-APi[i]*j);
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}
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//卖出
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front=back=1;
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for(int j=MaxP; j>=0; --j)
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{
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temp.p=j;
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temp.x=dp[i-W-1][j]+BPi[i]*j;
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for(;front<back&&q[back-1].x<temp.x;--back);
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q[back++]=temp;
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for(;front<back&&q[front].p-BSi[i]>j;++front);
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dp[i][j]=max(dp[i][j],q[front].x-BPi[i]*j);
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}
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}
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int ans=0;
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for(int i=0;i<=MaxP;++i)
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ans=max(ans,dp[T][i]);
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printf("%d\n",ans);
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}
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return 0;
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}
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