题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
const line = await readline()
const set = new Set()
for(s of line) {
set.add(s)
}
console.log(set.size)
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
const line = await readline()
const set = new Set()
for(s of line) {
set.add(s)
}
console.log(set.size)
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