int min = 0, max = 0;
for(int i = 0; i < size; i++)
{
    if(a[i] > max || i == 0) max = a[i];
    if(a[i] < min || i == 0) min = a[i];
}

int min = INT_MAX, max = INT_MIN;
for(int i = 0; i < size; i++)
{
    if(a[i] > max) max = a[i];
    if(a[i] < min) min = a[i];
}

int min = a[0], max = a[0];
for(int i = 1; i < size; i++)
{
    if(a[i] > max) max = a[i];
    if(a[i] < min) min = a[i];
}