This requires using C++. Write a simple run-length encoder: you will read a sequence of pairs containing a character and a number. For each pair (C,N), output the character N times without spaces. When a pair has number -1 print a newline, if the number is -2 then stop.

Sample Input:

- 10

N -1

- 2

o 6

- 2

N -1

- 4

v 2

- 4 N

-1

- 10

X -2

Sample Output:

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--oooooo--

----vv----

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