Added str ques 1 empty c file
Merging the soln for string manipulation by hari.

e to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
Update str1.py
Removed condition check for string length 1
Added solution to ques 3 of string manipulation
deleted 1.c file