Sage-Tips

How do I search for a problem in SPOJ?

How to find most solved questions in SPOJ?

1. Go to home page.
2. Click on Problems.
3. Click on Classical(usually selected by default)
4. You’ll see list of all problems, on the top you will see S ID NAME QUALITY USERS ACC DIFFICULTY. Click on USERS, and problems will be sorted userwise.

What does the binary search algorithm do?

Binary search is an efficient algorithm for finding an item from a sorted list of items. It works by repeatedly dividing in half the portion of the list that could contain the item, until you’ve narrowed down the possible locations to just one. We used binary search in the guessing game in the introductory tutorial.

What is the must requirement for binary search algorithm to work?

This search algorithm works on the principle of divide and conquer. For this algorithm to work properly, the data collection should be in the sorted form. Binary search looks for a particular item by comparing the middle most item of the collection. If a match occurs, then the index of item is returned.

Can we see solution in SPOJ?

No, for the same reason. If you need help with a problem please feel free to post about it in the ProblemSet Archve section of the forum.

What are the two requirements to use a binary search?

When you use a binary search function you must ensure that the input is sorted, and sorted to the order you’re going to use. If these two are not met – you’re not required to provide correct result.

What are the steps of binary search?

Binary Search Algorithm

• Step 1 – Read the search element from the user.
• Step 2 – Find the middle element in the sorted list.
• Step 3 – Compare the search element with the middle element in the sorted list.
• Step 4 – If both are matched, then display “Given element is found!!!” and terminate the function.

What is binary search problem?

Binary search compares the target value to the middle element of the array. If they are not equal, the half in which the target cannot lie is eliminated and the search continues on the remaining half, again taking the middle element to compare to the target value, and repeating this until the target value is found.

How do I submit a solution to SPOJ?

To submit solution click submit link and either paste code into provided text field or upload source code from file. Then pick the language of your submission and click Send button.