Problem 1154. Identify the heavier bag
Solution Stats
Problem Comments
-
4 Comments
I think it only takes 5 weighings when N=128. Am I incorrect?
agree 5 weighing for N=128 (worst case scenario you reduce to 43 15 5 2 1 after each consecutive weighing)
the last test case provided by the author is wrong: should be 5 since log(128)/log(3) < 5.
The problem is that the author do not specify an strategy. And as mentioned, dividing by 3 yields a better strategy than 6 weightings for 128. But, my guess is that the author counted the number of divisions instead of the number of weightings 128->[42 42 43] -> [14 14 14; 14 14 15]->[5 5 4; 5 5 5]->[2 2 0; 2 2 1]->[1;2]->1.
Solution Comments
-
1 Comment
Correct the test suite
Problem Recent Solvers51
Suggested Problems
-
273 Solvers
-
Find the sum of the elements in the "second" diagonal
1088 Solvers
-
510 Solvers
-
Create matrix of replicated elements
360 Solvers
-
Create a two dimensional zero matrix
442 Solvers
More from this Author5
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!