Silver Dollar Game

#include<bits/stdc++.h>

using namespace std;

int main()

{

    int n;

    cout << "Enter Number of Square : ";

    cin >> n;

    vector<int>indx, v(n+1);

    indx.push_back(0);       /// for handling odd number of 1

    cout << "Enter Each Square Coin is Place or Not : ";

    for(int i=1;i<=n;i++)   ///if coin place give value 1 otherwise 0

    {

        cin >> v[i];

        if(v[i] == 1)

            indx.push_back(i);

    }

    int xor_sum = 0;

    for(int i=indx.size()-1; i>=1; i-=2)

    {

        int d = indx[i] - indx[i-1] - 1;

        xor_sum ^= d;

    }

    if(xor_sum > 0)

        cout << "First Player Win." << "\n";

    else

        cout << "Second Player Win." << "\n";

    return 0;

}