The default questions (on which OP has gained #1) are just for practice. The actual contests held from time to time on which companies actually hire are difficu

The default questions (on which OP has gained #1) are just for practice. The actual contests held from time to time on which companies actually hire are difficult, and don't have solutions easily available. The default challenges are like examples, the real number #1s on Hackerrank contests are actual competitive programmers(similar to #1s on other sites like codeforces, topcoder).