add readme.sh script to help to generate the content in README.md for each problem

Author: haoel

scripts/README.md

@@ -44,3 +44,16 @@ The comments would be generated by above examples as below:
 
 
 ```
+
+### readme.sh
+
+`readme.sh` - it's used to generate the table item in README.md
+
+For example:
+
+```
+$  ./readme.sh ../algorithms/cpp/nextPermutation/nextPermutation.cpp 
+|31|[Next Permutation](https://oj.leetcode.com/problems/next-permutation/) | [C++](./algorithms/cpp/nextPermutation/nextPermutation.cpp)|Medium|
+```
+
+

scripts/readme.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+
+function usage()
+{
+
+    echo -e "Usage: ${0} [file]"
+    echo -e ""
+    echo -e "Example:"
+    echo -e ""
+    echo -e "   ${0} ./LargestNumber.cpp"
+    echo -e ""
+}
+
+
+
+if [ $# -lt 1 ] || [[ ! -f ${1} ]]; then
+    usage
+    exit 255
+fi
+
+DIR=`cd $(dirname ${1}) && pwd -P`
+FILE=${DIR}/$(basename ${1})
+
+URL=`grep Source ${FILE} | awk '{print $4}'`
+title_str=`xidel ${URL} -q -e "css('div.question-title h3')"` 
+NUM=`echo ${title_str} | awk -F '.' '{print $1}'`
+TITLE=`echo ${title_str} | awk -F '.' '{print $2}' | sed -e 's/^[[:space:]]*//'`
+DIFFCULT=`xidel ${URL} -q -e "css('.question-info')" | grep Difficulty | awk '{print $2}'`
+
+FILE=`echo ${FILE} | sed "s/.*\/algorithms/\.\/algorithms/"`
+
+echo "|${NUM}|[${TITLE}](${URL}) | [C++](${FILE})|${DIFFCULT}|"