Explain please (subtask)

In the ongoing june long challenge (chef and proxy problem)i am getting wrong answer .although the code is correct and shows correct output in the online ide.
i think it is because there is only one subtask having complete 100 points .which is “original constraints”
please tell me what does "original constraint " means and what do they want exactly ?

original constraints mean the max input sizes range the algorithm(your solution) is being tested . which is given in the statement .

some problems divides the tests made on solution from small to larger input sizes . where smaller tests which passed by your solution in the sub task will be given lower points than the other task which contains larger inputs .

you must be doing some mistake in the code. check your output for some more test cases other than given test cases. original constraints are nothing just range of values for which program will be tested.