用sort做一次

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
    cin>>a[0]>>a[1]>>a[2];
    sort(a, a + 3);
    if(a[0] + a[1] > a[2])
    {
        if(a[0] == a[1] && a[1] == a[2] && a[0] == a[2])
        {
            cout << "aaa";
        }
        else if(a[0] == a[1] || a[1] == a[2] || a[0] == a[2])
        {
            cout << "aab";
        }
        else
        {
            cout << "abc";
        }
        return 0; 
    }
    cout << "error";
    return 0;
}