#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char* readline();
char* ltrim(char*);
char* rtrim(char*);
char** split_string(char*);
int parse_int(char*);
/*
* Complete the 'surfaceArea' function below.
*
* The function is expected to return an INTEGER.
* The function accepts 2D_INTEGER_ARRAY A as parameter.
*/
int min(int a,int b)
{
return a>b?b:a;
}
int surfaceArea(int A_rows, int A_columns, int** A) {
int surfaceArea = 0;
for (int i = 0; i < A_rows; ++i) {
for (int j = 0; j < A_columns; ++j) {
surfaceArea += 6*A[i][j] - 2*(A[i][j]-1);
if (i+1 < A_rows) {
surfaceArea -= 2*min(A[i][j], A[i+1][j]);
}
if (j+1 < A_columns) {
surfaceArea -= 2*min(A[i][j], A[i][j+1]);
}
}
}
return surfaceArea;
}
int main()
{
FILE* fptr = fopen(getenv("OUTPUT_PATH"), "w");
char** first_multiple_input = split_string(rtrim(readline()));
int H = parse_int(*(first_multiple_input + 0));
int W = parse_int(*(first_multiple_input + 1));
int** A = malloc(H * sizeof(int*));
for (int i = 0; i < H; i++) {
*(A + i) = malloc(W * (sizeof(int)));
char** A_item_temp = split_string(rtrim(readline()));
for (int j = 0; j < W; j++) {
int A_item = parse_int(*(A_item_temp + j));
*(*(A + i) + j) = A_item;
}
}
int result = surfaceArea(H, W, A);
fprintf(fptr, "%d\n", result);
fclose(fptr);
return 0;
}
char* readline() {
size_t alloc_length = 1024;
size_t data_length = 0;
char* data = malloc(alloc_length);
while (true) {
char* cursor = data + data_length;
char* line = fgets(cursor, alloc_length - data_length, stdin);
if (!line) {
break;
}
data_length += strlen(cursor);
if (data_length < alloc_length - 1 || data[data_length - 1] == '\n') {
break;
}
alloc_length <<= 1;
data = realloc(data, alloc_length);
if (!data) {
data = '\0';
break;
}
}
if (data[data_length - 1] == '\n') {
data[data_length - 1] = '\0';
data = realloc(data, data_length);
if (!data) {
data = '\0';
}
} else {
data = realloc(data, data_length + 1);
if (!data) {
data = '\0';
} else {
data[data_length] = '\0';
}
}
return data;
}
char* ltrim(char* str) {
if (!str) {
return '\0';
}
if (!*str) {
return str;
}
while (*str != '\0' && isspace(*str)) {
str++;
}
return str;
}
char* rtrim(char* str) {
if (!str) {
return '\0';
}
if (!*str) {
return str;
}
char* end = str + strlen(str) - 1;
while (end >= str && isspace(*end)) {
end--;
}
*(end + 1) = '\0';
return str;
}
char** split_string(char* str) {
char** splits = NULL;
char* token = strtok(str, " ");
int spaces = 0;
while (token) {
splits = realloc(splits, sizeof(char*) * ++spaces);
if (!splits) {
return splits;
}
splits[spaces - 1] = token;
token = strtok(NULL, " ");
}
return splits;
}
int parse_int(char* str) {
char* endptr;
int value = strtol(str, &endptr, 10);
if (endptr == str || *endptr != '\0') {
exit(EXIT_FAILURE);
}
return value;
}
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