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#include <bits/stdc++.h>
#include "readfile.hpp"
int main(int argc, char const *argv[])
{
int res = 0;
std::vector<std::string> file = readfile("1.in");
if (file.empty()) {
return 1;
}
std::vector<int> left, right;
for (const auto &line : file) {
int n1, n2;
// put to vector
std::istringstream iss(line);
if (!(iss >> n1 >> n2)) {
std::cerr << "Invalid input line: " << line << std::endl;
return 1;
}
left.push_back(n1);
right.push_back(n2);
}
// sort
std::sort(left.begin(), left.end());
std::sort(right.begin(), right.end());
if (left.size() != right.size()) {
std::cerr << "size mismatch: " << left.size() << " vs " << right.size() << std::endl;
return 1;
}
// calc total distant
for (int i = 0; i < left.size(); i++) {
res += std::abs(left[i] - right[i]);
}
std::cout << "Result: " << res << std::endl;
return 0;
}
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