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OI-codes/LibreOJ/134/134.cpp

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#include <iostream>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = (1 << 12) + 5;
int n, m, op;
long long c[N][N];
int lowbit(int x) {
return x & -x;
}
void add(int x, int y, int v) {
for (int i = x; i <= n; i += lowbit(i)) {
for (int j = y; j <= m; j += lowbit(j)) {
c[i][j] += v;
}
}
}
void add(int x1, int y1, int x2, int y2, int v) {
add(x1, y1, v);
add(x1, y2 + 1, -v);
add(x2 + 1, y1, -v);
add(x2 + 1, y2 + 1, v);
}
long long sum(int x, int y) {
long long 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() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
while (cin >> op) {
if (op == 1) {
int a, b, c, d, k;
cin >> a >> b >> c >> d >> k;
add(a, b, c, d, k);
} else { // op == 2
int x, y;
cin >> x >> y;
cout << sum(x, y) << endl;
}
}
return 0;
}