@[jeffstart](/user/482998) `op` 是 char，你直接复制过来的吗（）
by xiaoyang222 @ 2024-05-29 22:57:19
@[xiaoyang222](/user/1220111) yes
by jeffstart @ 2024-05-29 22:57:35
@[xiaoyang222](/user/1220111) 还是有问题：
```cpp
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 3010;
int a[N][N], tr[N][N][4];
int lowbit(int x) {
return x & (-x);
}
void add(int x, int y, int c) {
for (int i = x; i < N; i += lowbit(i)) {
for (int j = y; j < N; j += lowbit(j)) {
tr[i][j][0] += c;
tr[i][j][1] += c * y;
tr[i][j][2] += c * x;
tr[i][j][3] += c * x * y;
}
}
}
int query(int x, int y) {
int ans = 0;
for (int i = x; i; i -= lowbit(i)) {
for (int j = y; j; j -= lowbit((j))) {
ans += tr[i][j][0] * (x + 1) * (y + 1) - (x + 1) * tr[i][j][1] - (y + 1) * tr[i][j][2] + tr[i][j][3];
}
}
return ans;
}
signed main() {
ios::sync_with_stdio(false), cin.tie(0);
int n, m, k;
cin >> n >> m >> k;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
int a = i, b = j, c = i, d = j;
int o;
cin >> o;
add(a, b, o);
add(a, d + 1, -o);
add(c + 1, b, -o);
add(c + 1, d + 1, o);
}
}
while(k--){
char op;
int a, b, c, d;
cin >> op >> a >> b >> c >> d;
if (op == 'L') {
int o;
cin >> o;
add(a, b, o), add(a, d + 1, -o), add(c + 1, b, -o), add(c + 1, d + 1, o);
} else {
cout << query(c,
d) - query(a - 1, d) - query(c, b - 1) + query(a - 1, b - 1) << '\n';
}
}
return 0;
}
```
还是 RE.
by jeffstart @ 2024-05-29 22:58:53
他开始没有读入，读一下题
by xiaoyang222 @ 2024-05-29 22:59:38
@[jeffstart](/user/482998) 他第一行不是这样子的
by xiaoyang222 @ 2024-05-29 23:03:52
[帮我调一下吧](https://www.luogu.com.cn/discuss/828579)
by xiaoyang222 @ 2024-05-29 23:04:19