66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
#include<stdio.h>
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#include<string.h>
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#include<iostream>
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using namespace std;
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char str[1100][1100];
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int s[1100][1100];
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struct Q
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{
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int num,left,right;
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}q[1100];
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int main()
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{
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int t;
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int row,col;
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int i,j,max;
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scanf("%d",&t);
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while(t--)
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{
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scanf("%d%d",&row,&col);
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for(i=1;i<=row;i++)
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for(j=1;j<=col;j++)
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{
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cin>>str[i][j];
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}
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for(i=0;i<=col;i++)
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s[0][i]=0;
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for(i=1;i<=row;i++)
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for(j=1;j<=col;j++)
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{
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if(str[i][j]!='R')
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s[i][j]=s[i-1][j]+1;
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else
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s[i][j]=0;
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}
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max=0;
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for(i=1;i<=row;i++)
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{
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for(j=1;j<=col;j++)
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{
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q[j].num=s[i][j];
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q[j].left=j;
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q[j].right=j;
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}
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q[0].num=-1;
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q[col+1].num=-1;
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for(j=1;j<=col;j++)
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{
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while(q[q[j].left-1].num>=q[j].num)
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q[j].left=q[q[j].left-1].left;
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}
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for(j=col;j>=1;j--)
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{
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while(q[q[j].right+1].num>=q[j].num)
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q[j].right=q[q[j].right+1].right;
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}
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for(j=1;j<=col;j++)
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{
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if(max<q[j].num*(q[j].right-q[j].left+1))
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max=q[j].num*(q[j].right-q[j].left+1);
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}
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}
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printf("%d\n",max*3);
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}
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return 0;
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}
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