1 files changed, 2 insertions, 2 deletions

diff --git a/2024/04/day04a.cpp b/2024/04/day04a.cpp
index 887ebef..d108dec 100644
--- a/2024/04/day04a.cpp
+++ b/2024/04/day04a.cpp
@@ -49,7 +49,7 @@ public:
                 cells = new char[M * N];
                 for (int i = 0; i < N; i++)
                         for (int j = 0; j < M; j++)
-                                cells[N*i + j] = j < (int)lines[i].size() ?
+                                cells[M*i + j] = j < (int)lines[i].size() ?
                                     lines[i][j] : out_of_bound;
         }
 
@@ -73,7 +73,7 @@ private:
                 auto [i, j] = p;
                 if (i >= N || i < 0 || j >= M || j < 0)
                         return out_of_bound;
-                return cells[N*i + j];
+                return cells[M*i + j];
         }
 };