max:     143 wheat +  60 barley;

capital: 120 wheat + 210 barley <= 15000;
storage: 110 wheat +  30 barley <=  4000;
land:        wheat +     barley <=    75;

//	¥H¤U¨â¥y¥i¬Ù²¤
//	0 <= wheat < +inf;
//	0 <= barley < +inf;