你的程序只能正确输出数量，但随后两行永远是
```
1 3
2 1
```
by 13813675795hzq @ 2023-03-02 19:40:17
###### 第9行应该为
```
int a[n+2][m+2], b[2500000];
```
###### 第36行应该为
```
for (int i = 1; i <= sum * 2; i = i + 2)
```
by 13813675795hzq @ 2023-03-02 19:46:24