How can I Earn laddus

As a newbie how can I earn laddus according to latest goodies policy and also what else we can explore on codechef.

First solve each problem individually: 100 laddus.
Country-wise participation: Top 10, 20 and 30 will get 30, 40 and 50 laddus as per participation (participation is counted by combining both Divisions)
Country-wise performance: 200, 250, and 300 laddus as per performance. Consistently in the top 10 ranks: 2500 laddus.