package q383

func canConstruct(ransomNote string, magazine string) bool {
	counts := make([]int, 'z'-'a'+1)

	for _, c := range magazine {
		if c < 'a' || c > 'z' {
			continue
		}
		counts[int(c)-int('a')]++
	}
	for _, c := range ransomNote {
		if c < 'a' || c > 'z' {
			continue
		}
		offset := int(c) - int('a')
		counts[offset]--
		if counts[offset] < 0 {
			return false
		}
	}
	return true
}

var _ = canConstruct