n=18000;
m=20;
V=[6758, 3500, 1200, 430, 530, 239, 2630, 500, 1120, 1430, 1420, 400, 1500, 666, 521, 1220, 2430, 1400, 3410, 2520];
P=[5, 3, 2, 4, 3, 3, 4, 2, 3, 3, 5, 4, 3, 3, 4, 1, 3, 2, 4, 3];