Check 15 integers are unique, C++ (vc++)

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#include <iostream>
#include <limits>

#define ARGUMENTS v_01, v_02, v_03, v_04, v_05, v_06, v_07, v_08, v_09, v_10, v_11, v_12, v_13, v_14, v_15

bool is_unique (int &being_checked, int &v_01, int &v_02, int &v_03, int &v_04, int &v_05, 
                int &v_06, int &v_07, int &v_08, int &v_09, int &v_10, 
                int &v_11, int &v_12, int &v_13, int &v_14, int &v_15
)
{
    // Save the value
    int i = being_checked;
        
    // The value is currently being checked
    being_checked = std::numeric_limits<int>::min();
        
     bool unique = true;
        
    if(false) unique = unique;
    else if(i == v_01) unique = false;
    else if(i == v_02) unique = false;
    else if(i == v_03) unique = false;
    else if(i == v_04) unique = false;
    else if(i == v_05) unique = false;
    else if(i == v_06) unique = false;
    else if(i == v_07) unique = false;
    else if(i == v_08) unique = false;
    else if(i == v_09) unique = false;
    else if(i == v_10) unique = false;
    else if(i == v_11) unique = false;
    else if(i == v_12) unique = false;
    else if(i == v_13) unique = false;
    else if(i == v_14) unique = false;
    else if(i == v_15) unique = false;
        
    // Restore the original value when done
    being_checked = i;
    return unique;        
};

int main()
{
    int v_01, v_02, v_03, v_04, v_05, v_06, v_07, v_08, v_09, v_10, v_11, v_12, v_13, v_14, v_15;

std::cout << "Enter 15 values : " << std::endl;    
    
    if(true)
    {
        v_01 = 11; std::cout << v_01 << std::endl;
        v_02 = 22; std::cout << v_02 << std::endl;
        v_03 = 35; std::cout << v_03 << std::endl;
        v_04 = 44; std::cout << v_04 << std::endl;
        v_05 = 52; std::cout << v_05 << std::endl;
        v_06 = 63; std::cout << v_06 << std::endl;
        v_07 = 74; std::cout << v_07 << std::endl;
        v_08 = 81; std::cout << v_08 << std::endl;
        v_09 = 94; std::cout << v_09 << std::endl;
        v_10 = 105; std::cout << v_10 << std::endl;
        v_11 = 112; std::cout << v_11 << std::endl;
        v_12 = 121; std::cout << v_12 << std::endl;
        v_13 = 135; std::cout << v_13 << std::endl;
        v_14 = 142; std::cout << v_14 << std::endl;
        v_15 = 151; std::cout << v_15 << std::endl;
    }
    else
    {
        std::cin >> v_01;
        std::cin >> v_02;
        std::cin >> v_03;
        std::cin >> v_04;
        std::cin >> v_05;
        std::cin >> v_06;
        std::cin >> v_07;
        std::cin >> v_08;
        std::cin >> v_09;
        std::cin >> v_10;
        std::cin >> v_11;
        std::cin >> v_12;
        std::cin >> v_13;
        std::cin >> v_14;
        std::cin >> v_15;        
    }
    
    
    bool unique(is_unique(v_01, ARGUMENTS));
    unique = unique && is_unique(v_02, ARGUMENTS);
    unique = unique && is_unique(v_03, ARGUMENTS);
    unique = unique && is_unique(v_04, ARGUMENTS);
    unique = unique && is_unique(v_05, ARGUMENTS);
    unique = unique && is_unique(v_06, ARGUMENTS);
    unique = unique && is_unique(v_07, ARGUMENTS);
    unique = unique && is_unique(v_08, ARGUMENTS);
    unique = unique && is_unique(v_09, ARGUMENTS);
    unique = unique && is_unique(v_10, ARGUMENTS);
    unique = unique && is_unique(v_11, ARGUMENTS);
    unique = unique && is_unique(v_12, ARGUMENTS);
    unique = unique && is_unique(v_13, ARGUMENTS);
    unique = unique && is_unique(v_14, ARGUMENTS);
    unique = unique && is_unique(v_15, ARGUMENTS);
    
    if(unique) 
    {
        std::cout << "15 values are unique" << std::endl;
    }
    else
    {
        std::cout << "15 values are NOT unique" << std::endl;        
    }
    
    return 0;    
}

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Compilation time: 1,82 sec, absolute running time: 0,33 sec, absolute service time: 2,16 sec