Getting error in code of algorithm stl problem

@souravkhanna227 please provide your code in coding blocks ide

done that , just check out the code now

@souravkhanna227 this codes does not seem to be of activity selection, it would be much better if you raise this doubt in the section it occurred. If you could resolve this doubt and raise the doubt in relevant section I would be able to see the exact question then only I might be able to help you.

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