Run time error (contest - facto sum)

#1

https://ide.codingblocks.com/#/s/29528

this is the question of contest name facto sun … i am not able to understand where did i go wrong?
please help me to solve this issue

#2

first of all, do provide with the question link. Still making guesses about the question, i have corrected your code and marked the mistakes. But without problem link, i can not verify it…

https://ide.codingblocks.com/#/s/29542

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