#include "dna.h"
#include <iostream>
using namespace std;
string A, B;
void init(std::string a, std::string b)
{
A = a, B = b;
}
int get_distance(int x, int y)
{
int C1[] = {0, 0, 0}, C2[] = {0, 0, 0};
for (int i = x; i <= y; i++)
{
if (A[i] == 'A') C1[0]++;
if (A[i] == 'T') C1[1]++;
if (A[i] == 'C') C1[2]++;
if (B[i] == 'A') C2[0]++;
if (B[i] == 'T') C2[1]++;
if (B[i] == 'C') C2[2]++;
}
if (C1[0] != C2[0] || C1[1] != C2[1] || C1[2] != C2[2]) return -1;
if (x - y <= 2)
{
if (x - y == 0) return 0;
if (x - y == 1)
{
if (A[x] == B[x]) return 0;
return 1;
}
if (A[x] == B[x] && A[x + 1] == B[x + 1] && A[y] == B[y]) return 0;
if (A[x] == B[x] || A[x + 1] == B[x + 1] || A[y] == B[y]) return 1;
return 2;
}
return 0;
}
