IN the unordered set ,we used generally value --pair in mapping but to find the subaarry equal to zero ,we just used unordered_map sumset it is true to written like that there is not necessary to have a key --value in mapping ???
IN the unordered set ,we used generally value --pair in mapping but to find the subaarry equal to zero ,,please check description
@AMIT_KUMAR
A map always has to be unordered_map<key,value> type
I don’t know where you saw only key or only value
But it was probably incorrect
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