| 15 | int ans=0; |
| 16 | |
| 17 | inline int read() |
| 18 | { |
| 19 | int x=0,f=1; |
| 20 | char ch=getchar(); |
| 21 | while(ch<'0'||ch>'9') |
| 22 | { |
| 23 | if(ch=='-') f=-1; |
| 24 | ch=getchar(); |
| 25 | } |
| 26 | while(ch>='0'&&ch<='9') |
| 27 | { |
| 28 | x=x*10+(ch-'0'); |
| 29 | ch=getchar(); |
| 30 | } |
| 31 | return x*f; |
| 32 | } |
| 33 | |
| 34 | int main() |
| 35 | { |