This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#include "dna.h"
using namespace std;
string A,B;
void init(string a, string b){
A=a;
B=b;
}
int get_distance(int x,int y){
if(y==x){
if(A[x]==B[x]) return 0;
else return -1;
}
else if(y==x+1){
if(A[x]==B[x] && A[x+1]==B[x+1]) return 0;
else if(A[x]==B[x+1] && A[x+1]==B[x]) return 1;
else return -1;
}
else{
if(A[x+2]==B[x+2]){
if(A[x]==B[x] && A[x+1]==B[x+1]) return 0;
else if(A[x]==B[x+1] && A[x+1]==B[x]) return 1;
else return -1;
}
else if(A[x+1]==B[x+1]){
if(A[x]==B[x] && A[x+2]==B[x+2]) return 0;
else if(A[x]==B[x+2] && A[x+2]==B[x]) return 1;
else return -1;
}
else if(A[x]==B[x]){
if(A[x+1]==B[x+1] && A[x+2]==B[x+2]) return 0;
else if(A[x+1]==B[x+2] && A[x+2]==B[x+1]) return 1;
else return -1;
}
else{
if(A[x]==B[x+1] && A[x+1]==B[x+2] && A[x+2]==B[x]) return 2;
else if(A[x+1] == B[x] && A[x+2]==B[x+1] && A[x]==B[x+2]) return 2;
else return -1;
}
}
}
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