g0801_0900.s0844_backspace_string_compare.Solution Maven / Gradle / Ivy
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Java Solution for LeetCode algorithm problems, continually updating
package g0801_0900.s0844_backspace_string_compare;
// #Easy #String #Two_Pointers #Stack #Simulation #Algorithm_II_Day_4_Two_Pointers
// #Level_1_Day_14_Stack #2022_03_24_Time_0_ms_(100.00%)_Space_40.1_MB_(87.37%)
public class Solution {
public boolean backspaceCompare(String s, String t) {
return cmprStr(s).equals(cmprStr(t));
}
private String cmprStr(String str) {
StringBuilder res = new StringBuilder();
int count = 0;
for (int i = str.length() - 1; i >= 0; i--) {
char currChar = str.charAt(i);
if (currChar == '#') {
count++;
} else {
if (count > 0) {
count--;
} else {
res.append(currChar);
}
}
}
return res.toString();
}
}