diff --git a/AcWing/797/797.cpp b/AcWing/797/797.cpp
new file mode 100644
index 00000000..bd9fae3b
--- /dev/null
+++ b/AcWing/797/797.cpp
@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+
+using std::cin;
+using std::cout;
+using std::endl;
+
+int n, m, l, r, c, b[100005];
+
+int main() {
+    cin >> n >> m;
+    for (int i = 1; i <= n; i++) {
+        cin >> c;
+        b[i] += c;
+        b[i + 1] -= c;
+    }
+    while (m--) {
+        cin >> l >> r >> c;
+        b[l] += c;
+        b[r + 1] -= c;
+    }
+    for (int i = 1; i <= n; i++) {
+        b[i] += b[i - 1];
+        cout << b[i] << ' ';
+    }
+    cout << endl;
+    return 0;
+}