```
#include <bits/stdc++.h>
#define ll __int128
using namespace std;
const ll Maxn=87;
ll N,M,f[Maxn][Maxn],a[Maxn][Maxn],ans,base[Maxn];
inline ll qread(){
char ch;ll x=0;bool f=0;
while((ch=getchar())<'0'||ch>'9') if(ch=='-') f=1;x=(ch^48);
while((ch=getchar())>='0'&&ch<='9') x=x*10+(ch^48);
return f?-x:x;
}
inline void write(ll x){
if(x<0) x=-x,putchar('-');
if(x>9) write(x/10);
putchar('0'+(x%10));
}
inline ll dp0(ll x){
memset(f,0,sizeof f);
for(ll i=1;i<=M;i++)
for(ll j=M;j>=i;j--)
f[i][j]=max(f[i][j],max(f[i-1][j]+base[M-j+i-1]*a[x][i-1],f[i][j-1]+base[M-j+i-1]*a[x][j+1]));
ll maxn=0;
for(ll i=1;i<=M;i++)
maxn=max(maxn,f[i][i]+a[x][i]*base[M]);
return maxn;
}
int main(){
N=qread(),M=qread();
base[0]=1;
for(ll i=1;i<=84;i++) base[i]=base[i-1]*2;
for(ll i=1;i<=N;i++)
for(ll j=1;j<=M;j++)
a[i][j]=qread();
for(ll i=1;i<=N;i++) ans+=dp0(i);
write(ans);
return 0;
}
```
by Adchory @ 2023-03-11 16:43:50
wyy,jbl
by cccyyyxxx @ 2023-03-11 16:44:17
……题目6
by Populus_euphratica @ 2023-03-11 16:44:22
6666666666
by __zaa__ @ 2023-03-11 16:45:07
qp
by SilverLi @ 2023-03-11 17:14:40
调教，指调整校对。
by Anomie @ 2023-03-11 17:25:41
同 $10$ pts，Cu Ball
by mukari @ 2023-03-11 18:56:41
改好了，是转移写错力
by Adchory @ 2023-03-23 17:38:35
6
by woizkx @ 2023-06-18 17:01:00