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 in string
fmt.Scan(&in)
res := 0
// 遍历输入字符串，利用map去重，统计个数
m := make(map[byte]bool, 0)
for i := 0; i < len(in); i++ {
if m[in[i]] {
continue
}
m[in[i]] = true
res++
}
fmt.Println(res)
}
#golang#
