이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <dna.h>
#include <bits/stdc++.h>
using namespace std;
vector <int> posa, posb;
const int N = 500500;
vector <int> pref(N);
void init(string a, string b)
{
int n = a.size();
for (int i = 0; i < n; ++i) {
if (a[i] == 'A') {
posa.push_back(0);
}
else if (a[i] == 'T') {
posa.push_back(1);
}
else if (a[i] == 'C') {
posa.push_back(2);
}
if (b[i] == 'A') {
posb.push_back(0);
}
else if (b[i] == 'T') {
posb.push_back(1);
}
else if (b[i] == 'C') {
posb.push_back(2);
}
}
int cur = 0;
for (int i = 0; i < n; ++i) {
if (posa[i] != posb[i]) {
cur++;
pref[i] = cur;
}
else {
if (i == 0) {
pref[i] = 0;
}
else {
pref[i] = pref[i - 1];
}
}
}
}
int get_distance(int x, int y)
{
if (y - x == 2) {
bool ok = true;
for (int i = x; i <= y; ++i) {
if (posa[i] != posb[i]) {
ok = false;
break;
}
}
if (ok) {
return 0;
}
int cnta = 0, cntt = 0, cntc = 0;
for (int i = x; i <= y; ++i) {
if (posa[i] == 0) {
cnta++;
}
else if (posa[i] == 1) {
cntt++;
}
else {
cntc++;
}
}
for (int i = x; i <= y; ++i) {
if (posb[i] == 0) {
cnta--;
}
else if (posb[i] == 1) {
cntt--;
}
else {
cntc--;
}
}
if (cnta != 0 or cntt != 0 or cntc != 0) {
return -1;
}
ok = false;
for (int i = x; i <= y; ++i) {
if (posa[i] == posb[i]) {
ok = true;
break;
}
}
if (ok) {
return 1;
}
else {
return 2;
}
}
else if (y - x == 1) {
if (posa[x] == posb[x] and posa[y] == posb[y]) {
return 0;
}
else if (posa[x] == posb[y] and posb[x] == posa[y]) {
return 1;
}
else {
return -1;
}
}
else if (y - x == 0) {
if (posa[x] == posb[x]) {
return 0;
}
else {
return -1;
}
}
else {
int cnta = 0, cntt = 0;
for (int i = x; i <= y; ++i) {
if (posa[i] == 0) {
cnta++;
}
else {
cntt++;
}
}
for (int i = x; i <= y; ++i) {
if (posb[i] == 0) {
cnta--;
}
else {
cntt--;
}
}
if (cnta != 0 or cntt != 0) {
return -1;
}
int cnt = 0;
if (x == 0) {
cnt = pref[y];
}
else {
cnt = pref[y] - pref[x - 1];
}
int res = (cnt + 1) / 2;
return res;
}
}
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