Lost Exponents

A teacher emailed her students the following task.

"Write a program that reads the expression $X = number_1^{pot_1} + number_2^{pot_2} + \dots + number_N^{pot_N}$ and prints the value of $X$. Every $number_1$ through $number_N$ is an integer, and every $pot_1$ through $pot_N$ is a one-digit integer."

While the teacher downloaded the file to her computer, the text formatting was lost and the task turned into a plain sum of $N$ integers.

$X = P_1 + P_2 + \dots + P_N$

For example, once the formatting was gone, the original $X = 21^2 + 125^3$ became $X = 212 + 1253$. Given the integers $P_1$ through $P_N$ of the damaged expression, compute and print the value of $X$ from the original task.

Here $a^N$ means $a$ multiplied by itself $N$ times, and $a^0 = 1$.

The first line contains the integer $N$ ($1 \le N \le 10$), the number of addends in the task.

Each of the next $N$ lines contains one integer $P_i$ ($10 \le P_i \le 9999$, $i = 1 \dots N$) from the damaged expression.

Print the value of $X$ from the original task on a single line. The input always satisfies $X \le 10^9$.

The last digit of each $P_i$ is the exponent and everything in front of it is the base. For example, $P_i = 573$ means $57^3 = 185193$.

When $P_i$ has two digits, the base is a single digit. When the last digit is 0, the exponent is 0 and the addend is worth 1.