#include "dna.h"
#include<bits/stdc++.h>
using namespace std;
string s1, s2;
void init(std::string a, std::string b) {
s1 = a;s2 = b;
}
int get_distance(int x, int y) {
long long count = 0;
long long counta1 = 0;
long long countt1 = 0;
long long countc1 = 0;
long long counta2 = 0;
long long countt2 = 0;
long long countc2 = 0;
for(int i=x;i<=y;i++){
if(s1[i] == 'A') counta1++;
if(s1[i] == 'T') countt1++;
if(s1[i] == 'C') countc1++;
if(s2[i] == 'A') counta2++;
if(s2[i] == 'T') countt2++;
if(s2[i] == 'C') countc2++;
if(s1[i] != s2[i]){
count++;
}
}
if(counta1 != counta2 || countt1 != countt2 || countc1 != countc2){
return -1;
}
else{
return (count+1)/2;
}
return 0;
}
