题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
package main
import (
"fmt"
)
func main() {
var input string
fmt.Scan(&input)
counter := make(map[string]struct{})
for i := 0; i < len(input); i++ {
counter[string(input[i])] = struct{}{}
}
fmt.Println(len(counter))
}
