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>
#define endl "\n"
#define finp for(int i=0; i<n; i++)
#define fknp for(int k=0; k<n; k++)
#define yeap cout<<"YES"<<endl
#define nope cout<<"NO"<<endl
#define inpintn int n; cin>>n
#define inpintarrn int arr[n]; for(int i=0; i<n; i++){cin>>arr[i];}
#define inpllarrn long long arr[n]; for(int i=0; i<n; i++){cin>>arr[i];}
#define ll long long
using namespace std;
#include "dna.h"
ll const N = 1e5+10;
string aa, bb;
ll arra[N], arrc[N], arrt[N];
ll brra[N], brrc[N], brrt[N];
void init(std::string a, std::string b) {
aa = a;
bb = b;
ll siz = a.size();
for(int i=0; i<siz; i++){
if(a[i]=='A'){
arra[i+1] = arra[i]+1;
arrc[i+1] = arrc[i];
arrt[i+1] = arrt[i];
} else if(a[i]=='C'){
arra[i+1] = arra[i];
arrc[i+1] = arrc[i]+1;
arrt[i+1] = arrt[i];
} else {
arra[i+1] = arra[i];
arrc[i+1] = arrc[i];
arrt[i+1] = arrt[i]+1;
}
if(b[i]=='A'){
brra[i+1] = brra[i]+1;
brrc[i+1] = brrc[i];
brrt[i+1] = brrt[i];
} else if(b[i]=='C'){
brra[i+1] = brra[i];
brrc[i+1] = brrc[i]+1;
brrt[i+1] = brrt[i];
} else {
brra[i+1] = brra[i];
brrc[i+1] = brrc[i];
brrt[i+1] = brrt[i]+1;
}
}
}
int get_distance(int x, int y) {
x = x+1;
y = y+1;
ll siz1 = aa.size();
ll diff[siz1+1];
diff[0] = 0;
for(int i=0; i<siz1; i++){
char p = aa[i];
char q = bb[i];
if(p!=q){
diff[i+1] = diff[i]+1;
} else {
diff[i+1] = diff[i];
}
}
ll xa = arra[y]-arra[x-1];
ll xc = arrc[y]-arrc[x-1];
ll xt = arrt[y]-arrt[x-1];
ll ya = brra[y]-brra[x-1];
ll yc = brrc[y]-brrc[x-1];
ll yt = brrt[y]-brrt[x-1];
ll d = diff[y]-diff[x-1];
if(xa==ya && xc==yc && xt==yt){
ll ans = d/2;
return ans;
} else {
return -1;
}
}
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