题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
import java.util.Scanner
fun main(args: Array<String>) {
val read = Scanner(System.`in`)
while (read.hasNextLine()) {
val a = read.nextLine()
val b = a.split("")
val map = hashMapOf<String, Int>()
for (i in b) {
map[i] = (map[i] ?: 0) + 1
}
val keys = map.keys.sortedWith(
compareBy<String> { -(map[it] ?: 0) }.thenBy {
it
}
)
println(keys.joinToString(""))
}
}
#kotlin#
