24 lines
407 B
C++
24 lines
407 B
C++
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#include<bits/stdc++.h>
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using namespace std;
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set<int>s;
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int main(){
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int n;
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cin>>n;
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for(int i=1;i<=n;i++){
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int t;
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cin>>t;
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int cnt=0;
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while(t!=0){
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int a=t%10;
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cnt+=a;//加出朋友数的和
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t/=10;
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}
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s.insert(cnt);//可以利用set的去重
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}
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cout<<s.size()<<endl;//已经去完了
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for(auto it=s.begin();it!=s.end();it++){
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cout<<*it<<endl;
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}
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return 0;
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}
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