题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
package main
import (
"fmt"
)
func main() {
var s string
fmt.Scanf("%s\n", &s)
count := 0
res := make(map[string]bool)
for _, v := range s {
if _, ok := res[string(v)]; !ok {
count++
res[string(v)] = true
}
}
fmt.Println(count)
}