Submission #10105

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
10105	2014-10-15 06:44:57	gs14030	On grid (kriii2_O)	C++98	1 / 4	1000 ms	2212 KiB

O

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#include <cstdio>
int n,m,gs[310][310],hs[310][310],gshs[310][310];
int koi(int a,int b)
{
    if(hs[a][b]!=-987654321) return hs[a][b];
    int x=0,y=0;
    if(a==n){ for(int i=b; i<=m; i++) x+=gs[a][i]; return x; }
    if(b==m){ for(int i=a; i<=n; i++) x+=gs[i][b]; return x; }
    for(int i=a; i<=n; i++)
        for(int j=b; j<=m; j++) y+=gs[i][j];
    for(int i=a; i<n; i++)
        for(int j=b; j<m; j++)
        {
            x=gshs[i][j]+gshs[a-1][b-1]-gshs[a-1][j]-gshs[i][b-1];
            x+=koi(i+1,j+1);
            if(y<x) y=x;
        }
    hs[a][b]=y;
    return hs[a][b];
}
int main()
{
    scanf("%d%d",&n,&m);
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) scanf("%d",&gs[i][j]);
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) hs[i][j]=-987654321;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) gshs[i][j]+=gs[i][j]+gshs[i-1][j]+gshs[i][j-1]-gshs[i-1][j-1];
    printf("%d",koi(1,1));
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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• Subtask 1: 1 / 1
• Subtask 2: 0 / 3