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@@ -0,0 +1,72 @@
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+package main
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+
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+import "bufio"
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+import "fmt"
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+import "os"
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+
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+type Digicode struct {
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+ mat [][]string
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+ result string
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+ pos []int
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+}
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+
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+func NewDigicode() Digicode {
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+ var res Digicode
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+ /** First case */
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+ /*
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+ res.pos = []int { 1, 1 }
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+ res.mat = append(res.mat, []string{"1", "2", "3"})
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+ res.mat = append(res.mat, []string{"4", "5", "6"})
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+ res.mat = append(res.mat, []string{"7", "8", "9"})
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+ */
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+
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+ /** second case */
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+ res.pos = []int { 2, 0 }
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+ res.mat = append(res.mat, []string{".", ".", "1", ".", "."})
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+ res.mat = append(res.mat, []string{".", "2", "3", "4", "."})
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+ res.mat = append(res.mat, []string{"5", "6", "7", "8", "9"})
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+ res.mat = append(res.mat, []string{".", "A", "B", "C", "."})
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+ res.mat = append(res.mat, []string{".", ".", "D", ".", "."})
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+ return res
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+}
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+
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+func (this *Digicode) NextDigit(line string) {
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+ code := make(map[rune][]int)
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+
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+ code['U'] = []int { -1, 0 }
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+ code['D'] = []int { 1, 0 }
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+ code['L'] = []int { 0, -1 }
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+ code['R'] = []int { 0, 1 }
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+
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+ for _, dir := range(line) {
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+ if (this.pos[0] + code[dir][0] < 0 ||
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+ this.pos[1] + code[dir][1] < 0 ||
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+ this.pos[0] + code[dir][0] >= len(this.mat) ||
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+ this.pos[1] + code[dir][1] >= len(this.mat[this.pos[0] + code[dir][0]])) {
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+ continue
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+ }
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+ newCode := []int { this.pos[0] + code[dir][0], this.pos[1] + code[dir][1]}
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+ if (this.mat[newCode[0]][newCode[1]] == ".") {
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+ continue
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+ }
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+ this.pos = newCode
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+ }
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+ this.result += this.mat[this.pos[0]][this.pos[1]]
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+}
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+
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+func main() {
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+ reader := bufio.NewReader(os.Stdin)
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+ code := NewDigicode()
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+
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+ for true {
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+ read, _, err := reader.ReadLine()
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+ if len(read) > 0 {
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+ code.NextDigit(string(read))
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+ }
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+ if (err != nil) {
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+ break
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+ }
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+ }
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+
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+ fmt.Println("output: ", code.result)
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+}
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