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:

---------- --oooooo-- ----vv---- ----------