Time complexity? how o(n^2)

#1

Predict the time complexity of the following recursive function, given the vector is of size N and the initial call is calSum(v, 0).

int sum = 0;
void calcSum(vector v, int i)
{
if(i == v.size())
return;
sum += v[i];
calcSum(v, i+1);
}

#2

@gopinathsah24
Because the vector is not passed by reference. It needs to make a copy of the vector before calling the function.

#3

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