g0701_0800.s0777_swap_adjacent_in_lr_string.Solution Maven / Gradle / Ivy
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Java-based LeetCode algorithm problem solutions, regularly updated
package g0701_0800.s0777_swap_adjacent_in_lr_string;
// #Medium #String #Two_Pointers
public class Solution {
public boolean canTransform(String start, String end) {
int i1 = 0;
int i2 = 0;
char[] s1 = start.toCharArray();
char[] s2 = end.toCharArray();
while (i1 < s1.length && i2 < s2.length) {
while (i1 < s1.length && s1[i1] == 'X') {
i1++;
}
while (i2 < s2.length && s2[i2] == 'X') {
i2++;
}
if (i1 == s1.length && i2 == s2.length) {
return true;
}
if (i1 == s1.length || i2 == s2.length) {
return false;
}
char c1 = s1[i1];
char c2 = s2[i2];
if (c1 != c2) {
return false;
}
if (c1 == 'L' && i1 < i2) {
return false;
}
if (c1 == 'R' && i1 > i2) {
return false;
}
i1++;
i2++;
}
while (i1 < s1.length && start.charAt(i1) == 'X') {
i1++;
}
while (i2 < s2.length && end.charAt(i2) == 'X') {
i2++;
}
return i1 == s1.length && i2 == s2.length;
}
}