How to decide whetther to give variables long long int or simple int

#1

as in this question all variables are in 10 power 5 still code does not work if i didnot declare them only int

#2

@shakul
Range of int is roughly -10^9 to +10^9 while that of long long int is -10^18 to + 10^18. So if you need to store values larger than 10^9 or lesser than -10^9 , you should use long long int .

Even though the values provided in the problem can all be stored in int as per the constraints , our final answer is a sum of products. This final value will get pretty large and cannot be stored in range of int. Morevoer , if you take int for your variables your computations are done considering int only and in case of overflow , the value becomes negative. Which is why its better to take long long int to avoid such complications.

#3

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