'commit'

TangDou/AcWing/BIT/LOJ134.cpp

@@ -0,0 +1,45 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+typedef long long LL;
+const int N = 5000;
+int n, m;
+
+LL c[N][N];
+#define lowbit(x) (x & -x)
+void add(int x, int y, int d) {
+    for (int i = x; i < N; i += lowbit(i))
+        for (int j = y; j < N; j += lowbit(j))
+            c[i][j] += d;
+}
+LL sum(int x, int y) {
+    LL res = 0;
+    for (int i = x; i; i -= lowbit(i))
+        for (int j = y; j; j -= lowbit(j))
+            res += c[i][j];
+    return res;
+}
+
+int main() {
+    // 加快读入
+    ios::sync_with_stdio(false), cin.tie(0);
+
+    cin >> n >> m;
+    int op;
+    while (cin >> op) {
+        if (op == 1) {
+            int x1, y1, x2, y2, d;
+            cin >> x1 >> y1 >> x2 >> y2 >> d;
+            // 二维差分
+            add(x1, y1, d);
+            add(x1, y2 + 1, -d);
+            add(x2 + 1, y1, -d);
+            add(x2 + 1, y2 + 1, d);
+        } else {
+            int x, y;
+            cin >> x >> y;
+            cout << sum(x, y) << '\n';
+        }
+    }
+    return 0;
+}