#include<iostream>
#include<vector>
using namespace std;
int main()
{
int n, sum;
string s;
int r[50] = {0};
cin >> n;
for (int i = 0; i < n; i++)
{
cin >> s;
sum = 0;
for (int j = 0; j < s.length(); j++)
{
sum += s[j] - '0';
}
r[sum]++;
}
vector<int> arr;
for (int i = 0; i < 50; i++)
{
if (r[i] != 0)
{
arr.push_back(i);
}
}
cout << arr.size() << endl;
for (int i = 0; i < arr.size(); i++)
{
if (i < arr.size() - 1) cout << arr[i] << " ";
if (i == arr.size() - 1) cout << arr[i];
}
}
PAT甲级1120
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转载自blog.csdn.net/NULLdream/article/details/82972270
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