1 files changed, 2 insertions, 2 deletions

diff --git a/2024/10/day10a.cpp b/2024/10/day10a.cpp
index fda4ab8..2c01ea2 100644
--- a/2024/10/day10a.cpp
+++ b/2024/10/day10a.cpp
@@ -42,7 +42,7 @@ public:
                 cells = new int[M * N];
                 for (int i = 0; i < N; i++)
                         for (int j = 0; j < M; j++)
-                                cells[N*i + j] = lines[i][j] - '0';
+                                cells[M*i + j] = lines[i][j] - '0';
         }
 
         ~Board() {
@@ -59,7 +59,7 @@ private:
 
         int coord(pair<int, int> p) {
                 auto [i, j] = p;
-                return i >= N || i < 0 || j >= M || j < 0 ? -1 : N*i + j;
+                return i >= N || i < 0 || j >= M || j < 0 ? -1 : M*i + j;
         }
 };