为啥本题取区间$(1, r)和(l, g)$会寄

r = (r - 1) % g + 1;
            l = (l - 1) % g + 1;
            if(l <= r) q[ ++ top] = {l, r};
            else q[ ++ top] = {1, r}, q[ ++ top] = {l, g};
            ```