#!/bin/bash

i_max=-1
j_max=0
locations=()
marked_locations=()
while read line; do
  if [ $i_max -lt 0 ]; then
    i_max=${#line}
  fi
  locations+=( $(sed 's/\([0-9]\)/\1 /g' <<< $line) )
  j_max=$((j_max+1))
done
for i in $(seq 0 $((i_max-1))); do
  for j in $(seq 0 $((j_max-1))); do
    marked_locations+=( 0 )
  done
done

for i in $(seq 0 $((i_max-1))); do
  for j in $(seq 0 $((j_max-1))); do
    curr_location=${locations[$((i+j*i_max))]}
    if { [ $i -gt 0 ] && [ $curr_location -ge ${locations[$((i-1+j*i_max))]} ] ;} \
	    || { [ $i -lt $((i_max-1)) ] && [ $curr_location -ge ${locations[$((i+1+j*i_max))]} ] ;} \
	    || { [ $j -gt 0 ] && [ $curr_location -ge ${locations[$((i+(j-1)*i_max))]} ] ;} \
	    || { [ $j -lt $((j_max-1)) ] && [ $curr_location -ge ${locations[$((i+(j+1)*i_max))]} ] ;}; then
      marked_locations[$((i+j*i_max))]=1
    fi
  done
done

sum=0
for i in $(seq 0 $((i_max-1))); do
  for j in $(seq 0 $((j_max-1))); do
    curr_location=${marked_locations[$((i+j*i_max))]}
    if [ $curr_location -eq 0 ]; then
      sum=$((sum+1+locations[i+j*i_max]))
    fi
  done
done
echo $sum