题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;
void async function () {
// Write your code here
const line = await readline()
const arr = []
for(let i=0; i<line.length;i++){
if(!arr.includes(line[i])){
arr.push(line[i])
}
}
console.log(arr.length)
}()
#华为od##huawei##华为OD面经#
