ll@H,@W,D=100,M=3D,A[M][M]{},x=0;rep(i,H)rep(j,W){ll@a;A[D+i][D+j]=a;}
rep(i,M)rep(j,i+1,M)x>?=sum[k,0,M](A[i][k]+A[j][k]),x>?=sum[k,0,M](A[k][i]+A[k][j]);
rep(i,-M,M)rep(j,i+1,M)x>?=sum[k,0,M@0<=i+k<M](A[i+k][k])+sum[k,0,M@0<=j+k<M](A[j+k][k]),x>?=sum[k,0,M@0<=i-k<M](A[i-k][k])+sum[k,0,M@0<=j-k<M](A[j-k][k]);
rep(i,M)rep(j,M)x>?=sum[k,0,M](A[i][k])+sum[k,0,M](A[k][j])-A[i][j],
x>?=sum[k,0,M](A[i][k])+sum[k,-M,M@0<=i+k<M&&0<=j+k<M](A[i+k][j+k])-A[i][j],
x>?=sum[k,0,M](A[i][k])+sum[k,-M,M@0<=i+k<M&&0<=j-k<M](A[i+k][j-k])-A[i][j],
x>?=sum[k,0,M](A[k][j])+sum[k,-M,M@0<=i+k<M&&0<=j+k<M](A[i+k][j+k])-A[i][j],
x>?=sum[k,0,M](A[k][j])+sum[k,-M,M@0<=i+k<M&&0<=j-k<M](A[i+k][j-k])-A[i][j],
x>?=sum[k,-M,M@0<=i+k<M&&0<=j+k<M](A[i+k][j+k])+sum[k,-M,M@0<=i+k<M&&0<=j-k<M](A[i+k][j-k])-A[i][j];
wt(x);