Data commit

Task/Spiral-matrix/Go/spiral-matrix.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+    "fmt"
+    "strconv"
+)
+
+var n = 5
+
+func main() {
+    if n < 1 {
+        return
+    }
+    top, left, bottom, right := 0, 0, n-1, n-1
+    sz := n * n
+    a := make([]int, sz)
+    i := 0
+    for left < right {
+        // work right, along top
+        for c := left; c <= right; c++ {
+            a[top*n+c] = i
+            i++
+        }
+        top++
+        // work down right side
+        for r := top; r <= bottom; r++ {
+            a[r*n+right] = i
+            i++
+        }
+        right--
+        if top == bottom {
+            break
+        }
+        // work left, along bottom
+        for c := right; c >= left; c-- {
+            a[bottom*n+c] = i
+            i++
+        }
+        bottom--
+        // work up left side
+        for r := bottom; r >= top; r-- {
+            a[r*n+left] = i
+            i++
+        }
+        left++
+    }
+    // center (last) element
+    a[top*n+left] = i
+
+    // print
+    w := len(strconv.Itoa(n*n - 1))
+    for i, e := range a {
+        fmt.Printf("%*d ", w, e)
+        if i%n == n-1 {
+            fmt.Println("")
+        }
+    }
+}