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yennanliuyennanliu
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add 371 java, update progress
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+144
-11
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4 files changed

+144
-11
lines changed

‎README.md

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Original file line numberDiff line numberDiff line change
@@ -546,7 +546,7 @@
546546
268| [Missing Number](https://leetcode.com/problems/missing-number/) | [Python](./leetcode_python/Bit_Manipulation/missing-number.py), [Java](./leetcode_java/src/main/java/LeetCodeJava/BitManipulation/MissingNumber.java) | _O(n)_ | _O(1)_ | Medium | Curated Top 75, `xor`,`amazon`,`fb`| OK* (2)
547547
318| [Maximum Product of Word Lengths](https://leetcode.com/problems/maximum-product-of-word-lengths/) | [Python](./leetcode_python/Bit_Manipulation/maximum-product-of-word-lengths.py) | _O(n)_ ~ _O(n^2)_ | _O(n)_ | Medium |Bit Manipulation, Counting Sort, Pruning| AGAIN (not start)
548548
342 | [Power of Four](https://leetcode.com/problems/power-of-four/) | [Python](./leetcode_python/Bit_Manipulation/power-of-four.py) | _O(1)_ | _O(1)_ |Easy |`power of num`| OK*
549-
371 | [Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/) | [Python](./leetcode_python/Bit_Manipulation/sum-of-two-integers.py) | _O(1)_ | _O(1)_ | Medium | Curated Top 75, `good basic`, `fb`| AGAIN********* (5) (bit op not start)
549+
371 | [Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/) | [Python](./leetcode_python/Bit_Manipulation/sum-of-two-integers.py), [Java](./leetcode_java/src/main/java/LeetCodeJava/BitManipulation/SumOfTwoIntegers.java) | _O(1)_ | _O(1)_ | Medium | Curated Top 75, `good basic`, `fb`| AGAIN********* (5) (bit op not start)
550550
389 | [Find the Difference](https://leetcode.com/problems/find-the-difference/) | [Python](./leetcode_python/Bit_Manipulation/find-the-difference.py) | _O(n)_ | _O(1)_ | Easy |`amazon`| OK (2)
551551
393 | [UTF-8 Validation](https://leetcode.com/problems/utf-8-validation/) |[Python](./leetcode_python/Bit_Manipulation/utf-8-validation.py) | _O(n)_ | _O(1)_ | Medium | `utf-8 encoding`, `google`, `fb`| AGAIN**** (not start*) (5)
552552
401 | [Binary Watch](https://leetcode.com/problems/binary-watch/) | [Python](./leetcode_python/Bit_Manipulation/binary-watch.py) | _O(1)_ | _O(1)_ | Easy | | OK*

‎data/progress.txt

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
20240313: 338,347
1+
20240313: 338,347,371
22
20240312: 297(again),300,322(again),323
33
20240311: 261(again!!!),268,269(again),271,295(again)
44
20240310: 213,217,226,230,235,238,242,252,253

‎data/to_review.txt

Lines changed: 9 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
2024-05-07 -> ['338,347']
1+
2024-05-07 -> ['338,347,371']
22
2024-05-06 -> ['297(again),300,322(again),323']
33
2024-05-05 -> ['261(again!!!),268,269(again),271,295(again)']
44
2024-05-04 -> ['213,217,226,230,235,238,242,252,253']
@@ -12,7 +12,7 @@
1212
2024-04-24 -> ['39,48(again),49,53,54']
1313
2024-04-23 -> ['20,21,23,33(again)']
1414
2024-04-22 -> ['1,3,5,4,19']
15-
2024-04-16 -> ['338,347']
15+
2024-04-16 -> ['338,347,371']
1616
2024-04-15 -> ['297(again),300,322(again),323']
1717
2024-04-14 -> ['261(again!!!),268,269(again),271,295(again)']
1818
2024-04-13 -> ['213,217,226,230,235,238,242,252,253']
@@ -23,27 +23,27 @@
2323
2024-04-08 -> ['100,102,104,105(again)']
2424
2024-04-07 -> ['73,76,79(again),91,25']
2525
2024-04-06 -> ['55(again),56,62,70']
26-
2024-04-03 -> ['338,347', '39,48(again),49,53,54']
26+
2024-04-03 -> ['338,347,371', '39,48(again),49,53,54']
2727
2024-04-02 -> ['297(again),300,322(again),323', '20,21,23,33(again)']
2828
2024-04-01 -> ['261(again!!!),268,269(again),271,295(again)', '1,3,5,4,19']
2929
2024-03-31 -> ['213,217,226,230,235,238,242,252,253']
3030
2024-03-30 -> ['207(again!!!),208,211(again),212']
3131
2024-03-29 -> ['152,153(again),190,191,198,200,206(again)']
3232
2024-03-28 -> ['139(again),141,143(again)']
3333
2024-03-27 -> ['121,124(again),125,128,133(again)']
34-
2024-03-26 -> ['338,347', '100,102,104,105(again)']
34+
2024-03-26 -> ['338,347,371', '100,102,104,105(again)']
3535
2024-03-25 -> ['297(again),300,322(again),323', '73,76,79(again),91,25']
3636
2024-03-24 -> ['261(again!!!),268,269(again),271,295(again)', '55(again),56,62,70']
3737
2024-03-23 -> ['213,217,226,230,235,238,242,252,253']
3838
2024-03-22 -> ['207(again!!!),208,211(again),212']
39-
2024-03-21 -> ['338,347', '152,153(again),190,191,198,200,206(again)', '39,48(again),49,53,54']
39+
2024-03-21 -> ['338,347,371', '152,153(again),190,191,198,200,206(again)', '39,48(again),49,53,54']
4040
2024-03-20 -> ['297(again),300,322(again),323', '139(again),141,143(again)', '20,21,23,33(again)']
4141
2024-03-19 -> ['261(again!!!),268,269(again),271,295(again)', '121,124(again),125,128,133(again)', '1,3,5,4,19']
42-
2024-03-18 -> ['338,347', '213,217,226,230,235,238,242,252,253', '100,102,104,105(again)']
42+
2024-03-18 -> ['338,347,371', '213,217,226,230,235,238,242,252,253', '100,102,104,105(again)']
4343
2024-03-17 -> ['297(again),300,322(again),323', '207(again!!!),208,211(again),212', '73,76,79(again),91,25']
44-
2024-03-16 -> ['338,347', '261(again!!!),268,269(again),271,295(again)', '152,153(again),190,191,198,200,206(again)', '55(again),56,62,70']
45-
2024-03-15 -> ['338,347', '297(again),300,322(again),323', '213,217,226,230,235,238,242,252,253', '139(again),141,143(again)']
46-
2024-03-14 -> ['338,347', '297(again),300,322(again),323', '261(again!!!),268,269(again),271,295(again)', '207(again!!!),208,211(again),212', '121,124(again),125,128,133(again)']
44+
2024-03-16 -> ['338,347,371', '261(again!!!),268,269(again),271,295(again)', '152,153(again),190,191,198,200,206(again)', '55(again),56,62,70']
45+
2024-03-15 -> ['338,347,371', '297(again),300,322(again),323', '213,217,226,230,235,238,242,252,253', '139(again),141,143(again)']
46+
2024-03-14 -> ['338,347,371', '297(again),300,322(again),323', '261(again!!!),268,269(again),271,295(again)', '207(again!!!),208,211(again),212', '121,124(again),125,128,133(again)']
4747
2024-03-13 -> ['297(again),300,322(again),323', '261(again!!!),268,269(again),271,295(again)', '213,217,226,230,235,238,242,252,253', '152,153(again),190,191,198,200,206(again)', '100,102,104,105(again)', '39,48(again),49,53,54']
4848
2024-03-12 -> ['261(again!!!),268,269(again),271,295(again)', '213,217,226,230,235,238,242,252,253', '207(again!!!),208,211(again),212', '139(again),141,143(again)', '73,76,79(again),91,25', '20,21,23,33(again)']
4949
2024-03-11 -> ['213,217,226,230,235,238,242,252,253', '207(again!!!),208,211(again),212', '152,153(again),190,191,198,200,206(again)', '121,124(again),125,128,133(again)', '55(again),56,62,70', '1,3,5,4,19']

‎leetcode_java/src/main/java/LeetCodeJava/BitManipulation/SumOfTwoIntegers.java

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package LeetCodeJava.BitManipulation;
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// https://leetcode.com/problems/sum-of-two-integers/description/
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public class SumOfTwoIntegers {
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// V0
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// IDEA : BIT OP
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// TODO : fix below
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// public int getSum(int a, int b) {
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//
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// if (a == 0 && b == 0){
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// return 0;
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// }
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//
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// if (a == 0 || b == 0){
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// if (a == 0){
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// return b;
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// }
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// return a;
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// }
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//
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// // bit op
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// String aBin = Integer.toBinaryString(a);
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// String bBin = Integer.toBinaryString(b);
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//
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// String res = addBinary(aBin, bBin);
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// return Integer.parseInt(res, 2);
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// }
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//
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// public static String addBinary(String a, String b) {
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// StringBuilder sb = new StringBuilder();
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// int i = a.length() - 1, j = b.length() - 1, carry = 0;
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// while (i >= 0 || j >= 0 || carry > 0) {
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// int sum = carry;
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// if (i >= 0) sum += a.charAt(i--) - '0';
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// if (j >= 0) sum += b.charAt(j--) - '0';
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// sb.append(sum % 2);
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// carry = sum / 2;
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// }
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// return sb.reverse().toString();
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// }
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//
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//// private int add(String x, String y){
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////
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//// int len = Math.max(x.length(), y.length());
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//// if (len > x.length()){
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//// x = (multiplyStr("0", len - x.length()) + x);
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//// }else{
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//// y = (multiplyStr("0", len - x.length()) + y);
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//// }
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////
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//// System.out.println("x = " + x + " y = " + y);
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////
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//// String res = "";
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////
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//// int plus = 0;
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//// for (int j = x.length()-1; j >= 0; j --){
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//// System.out.println("x.indexOf(j) = " + x.indexOf(j));
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//// int cur = Integer.parseInt(String.valueOf(x.indexOf(j))) + Integer.parseInt(String.valueOf(y.indexOf(j))) + plus;
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//// System.out.println("cur = " + cur);
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//// if (cur > 1){
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//// cur -= 2;
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//// plus = 1;
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//// res += cur;
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//// }else{
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//// res += cur;
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//// }
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//// }
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////
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//// if (plus != 0){
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//// res = "1" + res;
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//// }
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////
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//// // convert a Binary String to a base 10 integer in Java
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//// // https://stackoverflow.com/questions/10178980/how-to-convert-a-binary-string-to-a-base-10-integer-in-java
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////
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//// System.out.println("res = " + res);
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//// return Integer.parseInt(res, 2);
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//// }
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//
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// // https://stackoverflow.com/questions/2255500/can-i-multiply-strings-in-java-to-repeat-sequences
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// private static String multiplyStr(String s, int multiply){
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// StringBuilder r = new StringBuilder();
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// for (int i = 0; i < multiply; i++){
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// r.append(s);
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// }
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// return r.toString();
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// }
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// V1
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// IDEA : BIT OP
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// https://leetcode.com/problems/sum-of-two-integers/solutions/4623531/java-best-easy-solution-100-beats-0ms/
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public int getSum_1(int a, int b) {
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while(b!=0)
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{
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int carry=a&b;
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a=a ^ b;
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b=carry<<1;
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}
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return a;
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}
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// V2
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// https://leetcode.com/problems/sum-of-two-integers/solutions/84290/java-simple-easy-understand-solution-with-explanation/
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// Iterative
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public int getSum_2(int a, int b) {
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if (a == 0) return b;
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if (b == 0) return a;
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while (b != 0) {
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int carry = a & b;
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a = a ^ b;
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b = carry << 1;
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}
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return a;
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}
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// V3
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// https://leetcode.com/problems/sum-of-two-integers/solutions/84290/java-simple-easy-understand-solution-with-explanation/
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// Iterative
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public int getSubtract_3(int a, int b) {
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while (b != 0) {
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int borrow = (~a) & b;
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a = a ^ b;
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b = borrow << 1;
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}
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return a;
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}
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}

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