go: add «1497. Check If Array Pairs Are Divisible by k»

Signed-off-by: Matej Focko <me@mfocko.xyz>

go/check-if-array-pairs-are-divisible-by-k.go

@@ -0,0 +1,19 @@
+package main
+
+func canArrange(arr []int, k int) bool {
+	counters := make([]int, k)
+	for _, x := range arr {
+		counters[(x%k+k)%k]++
+	}
+
+	for i := 0; i < k && counters[i] != -1; i++ {
+		j := (k - i) % k
+		if counters[i] != counters[j] || (i == j && counters[i]%2 == 1) {
+			return false
+		}
+
+		counters[i], counters[j] = -1, -1
+	}
+
+	return true
+}