#include using namespace std;int N;int Arr[3];int Max[2][3];int Min[2][3];int main(){ cin >> N; cin >> Arr[0] >> Arr[1] >> Arr[2]; Max[0][0] = Min[0][0] = Arr[0]; Max[0][1] = Min[0][1] = Arr[1]; Max[0][2] = Min[0][2] = Arr[2]; for(int i=1; i> Arr[0] >> Arr[1] >> Arr[2]; Max[1][0] = max(Max[0][0], Max[0][1]) + Arr[0]; Max[1][1] = max(Max[0][0], max(Max[0][1], Max[0..