#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class IntervalIntersections {
  public:
    int minLength(int x1, int y1, int x2, int y2);
};

int IntervalIntersections::minLength(int x1, int y1, int x2, int y2)
{
  return 0;
}