Add solution #1252

Author: JoshCrozier

solutions/1252-cells-with-odd-values-in-a-matrix.js

@@ -0,0 +1,34 @@
+/**
+ * 1252. Cells with Odd Values in a Matrix
+ * https://leetcode.com/problems/cells-with-odd-values-in-a-matrix/
+ * Difficulty: Easy
+ *
+ * Given `n` and `m` which are the dimensions of a matrix
+ * initialized by zeros and given an array `indices`
+ * where `indices[i] = [ri, ci]`.
+ * For each pair of `[ri, ci]` you have to increment all
+ * cells in row `ri` and column `ci` by 1.
+ *
+ * Return the number of cells with odd values in the
+ * matrix after applying the increment to all `indices`.
+ */
+
+/**
+ * @param {number} n
+ * @param {number} m
+ * @param {number[][]} indices
+ * @return {number}
+ */
+var oddCells = function(n, m, indices) {
+  const matrix = new Array(n).fill().map(_ => new Array(m).fill(0));
+
+  indices.forEach(indice => {
+    const [row, column] = indice;
+    matrix[row].forEach((value, index) => matrix[row][index] = value + 1);
+    matrix.forEach(row => row[column] = row[column] + 1);
+  });
+
+  return matrix.reduce((count, row) => {
+    return count + row.filter(value => value % 2 !== 0).length;
+  }, 0);
+};