Stone game

input/code.cpp: In function 'int main()':
input/code.cpp:42:18: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized]
   42 |     cout << solve(a, b, "uolevi", "maija", 0);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:42:18: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]

#include <iostream>
#include <string>
#include <algorithm>    // std::max
using namespace std;

string solve(int a, int b, string player1, string player2, int prev)
{   
    if (a == 0 or b == 0)
    {
        return player1;
    }
    else if (a == 1 and b == 1)
    {
        return player2;
    }
    else if (a + b == 3)
    {
        return "draw";
    }
    else
    {   
        if (a != b)
        {
            int min = std::min(a, b);
            int max = std::max(a, b);
            int diff = max - min;
            return solve(min, min, player2, player1, diff);
        }
        else
        {   
            prev = max(prev, 1);
            int new_a = max(a - prev, 0);
            return solve(new_a, b, player2, player1, 0); 
        }
    }
}

int main()
{   
    int a, b;

    cout << solve(a, b, "uolevi", "maija", 0);
    return 0;
}

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