Unordered set, hashing

#1

if(pre == 0 or s.find(pre) != s.end()){
return true;
}
in line 11 0f this code
pre will never have 0.
then how the subarry sum will 0.

#2

@souravrao3110
how?
it depends upon the elements present in array.
2, -3, 1, 2
here at index=2, pre=0.
I hope same was your doubt.

#3

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