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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define MAX_BOARDS 100
static char *ReadLine(char *p, size_t size, FILE *fp)
{
if ((p=fgets(p, size, fp)))
{
size_t l = strlen(p);
while(l && p[l-1] == '\n')
{
p[--l] = 0;
}
}
return p;
}
static int Max(int a, int b)
{
return a > b ? a : b;
}
static int Min(int a, int b)
{
return a < b ? a : b;
}
int main(void)
{
char buff[1024];
int board[1000][1000] = {0};
char *p = NULL;
int f = 0;
int x1 = 0;
int y1 = 0;
int x2 = 0;
int y2 = 0;
int x = 0;
int y = 0;
int sum = 0;
while (ReadLine(buff, sizeof buff, stdin))
{
p = strtok(buff, " ,->");
x1 = atoi(p);
p = strtok(NULL, " ,->");
y1 = atoi(p);
p = strtok(NULL, " ,->");
x2 = atoi(p);
p = strtok(NULL, " ,->");
y2 = atoi(p);
if (x1 == x2)
{
for(y = Min(y1, y2); y <= Max(y1, y2); y++)
{
board[y][x1]++;
}
}
else if (y1 == y2)
{
for(x = Min(x1, x2); x <= Max(x1, x2); x++)
{
board[y1][x]++;
}
}
else
{
int dx;
int dy;
dx = x1 < x2 ? 1 : -1;
dy = y1 < y2 ? 1 : -1;
x = x1;
y = y1;
while(x != x2 && y != y2)
{
board[y][x]++;
x += dx;
y += dy;
}
board[y][x]++;
}
}
for(y = 0; y < 999; y++)
{
for(x = 0; x < 999; x++)
{
if (board[y][x] > 1)
{
sum++;
}
}
}
printf("sum = %d\n", sum);
return 0;
}
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