R Vector V84883

A vector R is a vector that is composed of two parts:

$$v = x_1 ~ x_2 ~ x_3 ~ x_4 \dots x_n ~ y_1 ~ y_2~ y_3 \dots y_m$$

such that the part $x_1 \dots x_n$ and the part $y_1 \dots y_m$ are ordered strictly in increasing order but $y_m < x_1$. We also have that $n,m > 0$. That is, neither part is empty.

We need to implement the function int vectorR(const vector<int>& v) with the following specification:

PRE: $v$ is a vector R and $\mid \! v \! \mid \geq 3$.

POST: The position of $y_1$ in $v$.

Observation

You only need to send the function we ask for and the actions and functions that you define yourself. The rest will be ignored.

Input

An undetermined number of vectors R with the following format: an integer indicating their size, and then the vector R. Every vector R has a size greater than or equal to 3.

Output

The position within the vector where $y_1$ is.