PAT 甲级 1120 Friend Numbers (20)
2018-05-18 本文已影响10人
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/*
PAT 甲级 1120 set
*/
#include <iostream>
#include <set>
using namespace std;
int id(int num){
int sum = 0;
while(num){
sum = sum + num%10;
num = num /10;
}
return sum;
}
int main() {
int n;
set<int> s;
scanf("%d", &n);
for(int i = 0; i < n; i++){
int v;
scanf("%d", &v);
s.insert(id(v));
}
cout << s.size() << endl;
for(auto it = s.begin(); it != s.end(); it++){
if(it != s.begin()) printf(" ");
printf("%d", *it);
}
return 0;
}