#include <iostream>
#include <math.h>

using namespace std;

class vector{
    public:
        float x, y;
        void input() {
            cin >> this->x >> this->y;
        }
        float len() {
            return sqrt(this->x*this->x + this->y*this->y);
        }
        vector operator+(vector tmp) {
            float x = this->x + tmp.x;
            float y = this->y + tmp.y;
            if (x >= 7)
                x -= 7;
            if (y >= 7)
                y -= 7;
            vector tmp_;
            tmp_.x = x; tmp_.y = y;
            return tmp_;
        }
        vector operator-(vector tmp) {
            float x = this->x - tmp.x;
            float y = this->y - tmp.y;
            if (x < 0)
                x += 7;
            if (y < 0)
                y += 7;
            vector tmp_;
            tmp_.x = x; tmp_.y = y;
            return tmp_;
        }
        int operator--(int n) {
            this->x--;
            this->y--;
        }
        int operator++(int n) {
            this->x++;
            this->y++;
        }
};
int main()
{
    int n = 4;
    vector mass[n];
    for (int i = 0; i < n; i++)
    {
        cout << "Enter " << i+1 << " vector coords: ";
        mass[i].input();
    }
    int n1 = 0, n2 = 1, s = 999999;
    for (int i = 0; i < n - 1; i++)
        for (int j = i + 1; j < n; j++)
            {
                vector tmp = mass[i] + mass[j];
                if (tmp.len()/2 > s)
                {
                    n1 = i;
                    n2 = j;
                    s = tmp.len()/2;
                }
            }
    cout << "Index of elements min sr znachenien: " << n1 << " " << n2 << endl;
    return 0;
}