diff --git a/CMakeLists.txt b/CMakeLists.txt
index d57756f..30f6d98 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,4 +26,5 @@ add_executable(Playground
         eating-snake/main.cc
         insert-sort/main.cc
         csp-decode/main.cc
-        palin/main.cc)
+        palin/main.cc
+        csp-backpack/main.cc)
diff --git a/csp-backpack/main.cc b/csp-backpack/main.cc
new file mode 100644
index 0000000..e30dcde
--- /dev/null
+++ b/csp-backpack/main.cc
@@ -0,0 +1,25 @@
+#include <cstring>
+#include <iostream>
+
+using namespace std;
+#define maxn 10005
+#define M 105
+int dp[maxn];
+int w[M][M];
+
+int main() {
+    int T, n, W;
+    cin >> T >> n >> W;
+    for (int i = 1; i <= T; i++)
+        for (int j = 1; j <= n; j++) // <- used to be i++
+            cin >> w[i][j];
+    for (int i = 1; i < T; i++) {
+        memset(dp, 0, sizeof dp);
+        for (int j = 1; j <= n; j++)
+            for (int k = w[i][j]; k <= W; k++)
+                dp[k] = max(dp[k], dp[k - w[i][j]] + w[i + 1][j] - w[i][j]);
+        W = max(dp[W] + W, W);
+    }
+    cout << W << endl;
+    return 0;
+}
\ No newline at end of file