diff --git a/AcWing/796/796.cpp b/AcWing/796/796.cpp
new file mode 100644
index 00000000..e2442bb5
--- /dev/null
+++ b/AcWing/796/796.cpp
@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+
+using std::cin;
+using std::cout;
+using std::endl;
+
+int n, m, q, g[1005][1005], sum[1005][1005];
+
+int main() {
+    cin >> n >> m >> q;
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= m; j++) {
+            cin >> g[i][j];
+        }
+    }
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= m; j++) {
+            sum[i][j] = sum[i - 1][j] + sum[i][j - 1] - sum[i - 1][j - 1] + g[i][j];
+        }
+    }
+    while (q--) {
+        int x1, y1, x2, y2;
+        cin >> x1 >> y1 >> x2 >> y2;
+        cout << sum[x2][y2] - sum[x1 - 1][y2] - sum[x2][y1 - 1] + sum[x1 - 1][y1 - 1] << endl;
+    }
+    return 0;
+}