The mathematical formula of mahjong?

Learn the mathematical formula of mahjong in one minute: nAAA+mABC+DD wins, and mn can be equal to 0.

AAA is three identical cards, ABC is a straight and DD is a pair. Mn can be 0, which is what high school mathematics must understand: at least 1 in mm can be 0.

Case study:

In the early stage of dealing, the dealer has 14 cards, and the leisure family has 13 cards. If you want Hu, you should try to make this 13 card conform to the law of nAAA+mABC+DD in the process of touching cards, playing cards and eating. Note: Seven cards of "Southeast, Northwest, Middle and White" cannot form ABC, but only AAA.

-Touch cards, play cards. Let's play a card without touching. It's time for leisure. Touch one card first, then play another. It's the next person's turn. Mainly to knock out the cards that are not conducive to the formula.

Eat, touch, and bar:

I have five and six. At this time, if there are seven or four things in my family, then I can call them "eating". The general rule is:

The cards played by my family can help me form a straight ABC form;

Others don't call it "right (touch), bar, Hu"

If the above conditions are met at the same time, it can be called "eating". Then take out the straight pair and lay it flat on the side.

Draw cards and Hu cards:

After the above steps, the standard formula in the meeting is one card short. It's called drawing cards. As shown above, I have two AAA types, that is, m=2. They are: three east winds and three riches. These two on the side, that is, I am not mistaken. There are 1 ABC types on the far right, which are 7, 8 and 9 respectively. Behind it is a DD type-two 80,000. Please note that there can only be one DD.

There are two single cards, thirty thousand and fifty thousand. At this time, all I have to do is touch 40 thousand, or I can give 40 thousand at home, so I can play Hu cards. Finally, my formula is 2AAA+2ABC+DD.