为啥右端点只到 $39940$，不是很懂
``` diff
if (!op) {
int k = rd;
k = (k + lastans - 1) % 39989 + 1;
- wt(lastans = query(root, 1, 39940, k).y, '\n');
+ wt(lastans = query(root, 1, 39989, k).y, '\n');
} else {
int x0 = rd, y0 = rd, x1 = rd, y1 = rd;
x0 = (x0 + lastans - 1) % 39989 + 1, x1 = (x1 + lastans - 1) % 39989 + 1;
y0 = (y0 + lastans - 1) % (int) (1e9) + 1, y1 = (y1 + lastans - 1) % (int) (1e9) + 1;
if (x0 > x1) swap(x0, x1), swap(y0, y1);
add_edge(x0, y0, x1, y1);
- modify(root, 1, 39940, x0, x1, cntedge);
+ modify(root, 1, 39989, x0, x1, cntedge);
}
```
by hellolin @ 2023-10-17 08:16:53