#include<bits/stdc++.h>
using namespace std;
__int128 n,m,a[110][110],ans,f[110][110];
void scan(__int128 &x)//输入
{
    x = 0;
    int f = 1;
    char ch;
    if((ch = getchar()) == '-') f = -f;
    else x = x*10 + ch-'0';
    while((ch = getchar()) >= '0' && ch <= '9')
        x = x*10 + ch-'0';
    x *= f;
}
void _print(__int128 x)
{
    if(x > 9) _print(x/10);
    putchar(x%10 + '0');
}
void print(__int128 x)//输出
{
    if(x < 0)
    {
        x = -x;
        putchar('-');
    }
    _print(x);
}


int main(){
    scan(n);
    scan(m);
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            scan(a[i][j]);
        }
    }
    for(int k=1; k<=n; k++){
        __int128 Max=0; memset(f,0,sizeof(f));
        for(int i=0; i<=m; i++){
            for(int j=0; i+j<=m; j++){
                if(j!=0) f[i][j]=max(f[i][j],f[i][j-1]+a[k][m-j+1]*(2<<(i+j-1)));
                if(i!=0) f[i][j]=max(f[i][j],f[i-1][j]+a[k][i]*(2<<(i+j-1)));
            }
        }
        for(int i=0; i<=m; i++) Max=max(Max,f[i][m-i]);
        ans+=Max;
    }
    print(ans);
    return 0;
}

输入：5 5 0 0 0 0 0 0 0 0 0 1 876 1 566 920 598 259 945 123 659 997 176 478 293 464 278 应输出118214

实输出118214