题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
let line;
function func(line) {
let arr = line.split('');
let set = [...new Set(arr)];
return set.length;
}
while(line = readline()){
print(func(line));
}
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