New problem done

problems/1252/main.py

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+class Solution:
+    def oddCells(self, n, m, indices):
+        
+        # Initialise the matrix
+        matrix = []
+        for x in range(n):
+            new_row = []
+            for y in range(m):
+                new_row.append(0)
+            matrix.append(new_row)
+            
+        # Now apply steps
+        for i in indices:
+            ri = i[0]
+            ci = i[1]
+            for n in range(len(matrix[ri])):
+                matrix[ri][n] += 1
+            for n in range(len(matrix)):
+                matrix[n][ci] += 1
+                
+        # now count odd values (this could be done while changes are made, but this is easier to reason)
+        count = 0
+        for x in range(len(matrix)):
+            for y in range(len(matrix[x])):
+                if matrix[x][y] % 2 != 0:
+                    count += 1
+            
+        return count
+
+s = Solution()
+print("Expected: 6")
+print("Got:", s.oddCells(2, 3, [[0, 1], [1, 1]]))

problems/1252/problem.txt

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+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.
+
+(There was pictures here, but hopefully this is clear enough) 
+
+Example 1:
+
+Input: n = 2, m = 3, indices = [[0,1],[1,1]]
+Output: 6
+Explanation: Initial matrix = [[0,0,0],[0,0,0]].
+After applying first increment it becomes [[1,2,1],[0,1,0]].
+The final matrix will be [[1,3,1],[1,3,1]] which contains 6 odd numbers.
+
+Example 2:
+
+Input: n = 2, m = 2, indices = [[1,1],[0,0]]
+Output: 0
+Explanation: Final matrix = [[2,2],[2,2]]. There is no odd number in the final matrix.
+
+ 
+
+Constraints:
+
+    1 <= n <= 50
+    1 <= m <= 50
+    1 <= indices.length <= 100
+    0 <= indices[i][0] < n
+    0 <= indices[i][1] < m
+

problems/1252/run.sh

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+#!/bin/bash
+
+python3 main.py