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AddBinary.java
36 lines (35 loc) · 981 Bytes
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AddBinary.java
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public class AddBinary {
public static String addBinary(String a, String b) {
StringBuilder sb = new StringBuilder();
int i = a.length() - 1;
int j = b.length() - 1;
int remain = 0;
while (i >= 0 && j >= 0) {
int s = (a.charAt(i) - '0') + (b.charAt(j) - '0') + remain;
sb.append(s % 2);
remain = s / 2;
i--;
j--;
}
while (i >= 0) {
int s = (a.charAt(i) - '0') + remain;
sb.append(s % 2);
remain = s / 2;
i--;
}
while (i >= 0) {
int s = (b.charAt(j) - '0') + remain;
sb.append(s % 2);
remain = s / 2;
j--;
}
if (remain > 0) {
sb.append(remain);
}
sb.reverse();
return sb.toString();
}
public static void main(String[] args) {
System.out.println(addBinary("1101", "1111"));
}
}