-
Notifications
You must be signed in to change notification settings - Fork 0
/
1002.cpp
44 lines (44 loc) · 1.12 KB
/
1002.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#include <iostream>
using namespace std;
int main()
{
unsigned long l,w,a,b,max=0;
long i,j,x,y;
cin>>l>>w;
int** field=new int*[l];
for (i=0;i<l;++i)
{
field[i]=new int[w];
for (j=0;j<w;++j) cin>>field[i][j];
}
cin>>a>>b;
x=l-a;y=w-b;
unsigned long** f2=new unsigned long*[l];
for (i=0;i<l;++i) f2[i]=new unsigned long[y+1];
unsigned long** f3=new unsigned long*[x+1];
for (i=0;i<x+1;++i) f3[i]=new unsigned long[y+1];
for (i=0;i<l;++i)
{
f2[i][y]=0;
for (j=y;j<w;++j) f2[i][y]+=field[i][j];
for (j=y-1;j>=0;--j) f2[i][j]=field[i][j]+f2[i][j+1]-field[i][j+b];
}
for (j=0;j<y+1;++j)
{
f3[x][j]=0;
for (i=x;i<l;++i) f3[x][j]+=f2[i][j];
if (f3[x][j]>max) max=f3[x][j];
for (i=x-1;i>=0;--i)
{
f3[i][j]=f2[i][j]+f3[i+1][j]-f2[i+a][j];
if (f3[i][j]>max) max=f3[i][j];
}
}
cout<<max;
for (i=0;i<l;++i) delete [] field[i];
delete [] field;
for (i=0;i<l;++i) delete [] f2[i];
delete [] f2;
for (i=0;i<x+1;++i) delete [] f3[i];
delete [] f3;
}