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package main
import (
"bufio"
"fmt"
"os"
"git.adyxax.org/aoc/2021/05/line"
)
func main() {
matrix := make([][]int, 1000)
for i := 0; i < 1000; i++ {
matrix[i] = make([]int, 1000)
}
parser := line.NewParser(bufio.NewReader(os.Stdin))
for {
l, err := parser.Parse()
if err != nil {
break
}
if l.X1 == l.X2 {
if l.Y1 > l.Y2 {
l.Y1, l.Y2 = l.Y2, l.Y1
}
for i := l.Y1; i <= l.Y2; i++ {
matrix[l.X1][i]++
}
} else if l.Y1 == l.Y2 {
if l.X1 > l.X2 {
l.X1, l.X2 = l.X2, l.X1
}
for i := l.X1; i <= l.X2; i++ {
matrix[i][l.Y1]++
}
}
}
score := 0
for i := 0; i < 1000; i++ {
for j := 0; j < 1000; j++ {
if matrix[i][j] >= 2 {
score++
}
}
}
fmt.Println(score)
}
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