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3D Surface Area
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3D Surface Area
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s=input().split(" ")
h=int(s[0])
w=int(s[1])
i=0
a=[]
a1=[]
while i<h:
a1 = list(map(int,input().split()))
a.append(a1)
i+=1
#print(a)
tr=0
tc=0
i=0
area=0
while i<h:
j=0
while j<w:
tr=i-1
tc=j
t=4*(a[i][j])
if tr>=0 and tc>=0:
if a[i][j]<a[tr][tc]:
t-=a[i][j]
else:
t-=a[tr][tc]
#print("top",t)
tr=i
tc=j+1
if tc<w:
if a[i][j]<a[tr][tc]:
t-=a[i][j]
else:
t-=a[tr][tc]
#print("right",t)
tr=i+1
tc=j
if tr<h:
if a[i][j]<a[tr][tc]:
t-=a[i][j]
else:
t-=a[tr][tc]
#print("bottom",t)
tr=i
tc=j-1
if tc>=0:
if a[i][j]<a[tr][tc]:
t-=a[i][j]
else:
t-=a[tr][tc]
#print((i,j),"final",t)
area+=t
if a[i][j]!=0:
area+=2
t=0
j+=1
i+=1
print(area)