C++ :

#include <iostream>
#include <algorithm>
using namespace std;

int main(void)
{
  int nums[7];
  for (int i=0; i<7; i++) cin >> nums[i];
  sort (nums, nums+7);
  int a = nums[0], b = nums[1];
  int c = nums[6] - a - b;
  cout << a << " " << b << " " << c << "\n";
}