摘要：
模板1 cpp include include using namespace std; int n, m, c[500010]; inline int read(){ int s=0,w=1; char ch=getchar(); while(ch'9') { if(ch==' ')w= 1; c 阅读全文
摘要：
```cpp include include using namespace std; long long a[80010], b[80010], sum[80010], ans, now; long long n, opt, mod, minn, maxx, l, r, x, f; char ch 阅读全文