Add solution #3484

Author: JoshCrozier

README.md

@@ -2757,6 +2757,7 @@
 3479|[Fruits Into Baskets III](./solutions/3479-fruits-into-baskets-iii.js)|Medium|
 3480|[Maximize Subarrays After Removing One Conflicting Pair](./solutions/3480-maximize-subarrays-after-removing-one-conflicting-pair.js)|Hard|
 3481|[Apply Substitutions](./solutions/3481-apply-substitutions.js)|Medium|
+3484|[Design Spreadsheet](./solutions/3484-design-spreadsheet.js)|Medium|
 3487|[Maximum Unique Subarray Sum After Deletion](./solutions/3487-maximum-unique-subarray-sum-after-deletion.js)|Easy|
 3491|[Phone Number Prefix](./solutions/3491-phone-number-prefix.js)|Easy|
 3495|[Minimum Operations to Make Array Elements Zero](./solutions/3495-minimum-operations-to-make-array-elements-zero.js)|Hard|

solutions/3484-design-spreadsheet.js

@@ -0,0 +1,71 @@
+/**
+ * 3484. Design Spreadsheet
+ * https://leetcode.com/problems/design-spreadsheet/
+ * Difficulty: Medium
+ *
+ * A spreadsheet is a grid with 26 columns (labeled from 'A' to 'Z') and a given number
+ * of rows. Each cell in the spreadsheet can hold an integer value between 0 and 105.
+ *
+ * Implement the Spreadsheet class:
+ * - Spreadsheet(int rows) Initializes a spreadsheet with 26 columns (labeled 'A' to 'Z')
+ *   and the specified number of rows. All cells are initially set to 0.
+ * - void setCell(String cell, int value) Sets the value of the specified cell. The cell
+ *   reference is provided in the format "AX" (e.g., "A1", "B10"), where the letter represents
+ *   the column (from 'A' to 'Z') and the number represents a 1-indexed row.
+ * - void resetCell(String cell) Resets the specified cell to 0.
+ * - int getValue(String formula) Evaluates a formula of the form "=X+Y", where X and Y are
+ *   either cell references or non-negative integers, and returns the computed sum.
+ *
+ * Note: If getValue references a cell that has not been explicitly set using setCell, its
+ * value is considered 0.
+ */
+
+/**
+ * @param {number} rows
+ */
+var Spreadsheet = function(rows) {
+  this.cellValues = new Map();
+  this.totalRows = rows;
+};
+
+/**
+ * @param {string} cell
+ * @param {number} value
+ * @return {void}
+ */
+Spreadsheet.prototype.setCell = function(cell, value) {
+  this.cellValues.set(cell, value);
+};
+
+/**
+ * @param {string} cell
+ * @return {void}
+ */
+Spreadsheet.prototype.resetCell = function(cell) {
+  this.cellValues.delete(cell);
+};
+
+/**
+ * @param {string} formula
+ * @return {number}
+ */
+Spreadsheet.prototype.getValue = function(formula) {
+  const expression = formula.slice(1);
+  const operands = expression.split('+');
+
+  const leftValue = this.parseOperand(operands[0]);
+  const rightValue = this.parseOperand(operands[1]);
+
+  return leftValue + rightValue;
+};
+
+/**
+ * @param {string} operand
+ * @return {number}
+ */
+Spreadsheet.prototype.parseOperand = function(operand) {
+  if (/^\d+$/.test(operand)) {
+    return parseInt(operand);
+  }
+  return this.cellValues.get(operand) || 0;
+};