A poverty alleviation industrial base plans to grow four kinds of crops: purple potato, sweet potato, pumpkin and corn
The planting area of the four crops varies, and the following conditions need to be met: (1) either the planting area of purple potato is the largest, or the planting area of pumpkin is the largest; (2) if the planting area of purple potato is the largest, the planting area of sweet potato is the smallest
The planting area of corn is larger than that of pumpkin.