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/*
Challenge 006
Challenge #1
Create a script which takes a list of numbers from command line and print the
same in the compact form. For example, if you pass "1,2,3,4,9,10,14,15,16"
then it should print the compact form like "1-4,9,10,14-16".
*/
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
vector<int> nums;
void parse_nums(const string& str) {
istringstream iss(str);
string num_str;
while (getline(iss, num_str, ',')) {
int num = atoi(num_str.c_str());
nums.push_back(num);
}
}
int main(int argc, char* argv[]) {
if (argc != 2) return EXIT_FAILURE;
parse_nums(argv[1]);
for (size_t i = 0; i < nums.size(); i++) {
cout << nums[i];
if (i + 2 < nums.size() &&
nums[i + 1] == nums[i] + 1 &&
nums[i + 2] == nums[i] + 2) {
size_t j = 0;
while (i + j < nums.size() && nums[i + j] == nums[i] + j)
j++;
i += j - 1;
cout << "-" << nums[i];
}
if (i + 1 < nums.size())
cout << ",";
}
cout << endl;
}
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