SRM487 Div2 Easy(250) BunnyExamAfter

BunnyExamAfter

#include <string>
using namespace std;

class BunnyExamAfter{public:
int getMaximum( string black, string gray, string white )
{
    int N = (int)black.size();

    int ans = 0;

    for ( int i=0; i<N; i++ )
    {
        if ( black[i] != gray[i]  ||  black[i] != white[i] )
            ans++;
        if ( black[i] != gray[i]  &&  gray[i] == white[i] )
            ans++;
    }

    return ans;
}};