倉庫裡積了一層薄薄的灰,看上去這裡已經空置很久了
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsISPrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdsATOfd3bkFGazxCMx8VesATMfhHLlN3XnxCMwEzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-YWan5CM1UTO0MjY4UjM3EDZ1gzMzIDOjhTZlZ2N5YWNldDMz8CX2AzLchDMxIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjL3M3Lc9CX6MHc0RHaiojIsJye.gif)
1 int read(){
2 int x=0,f=1;char ch=getchar();
3 while(ch<'0' || ch>'9'){if(ch=='-')f=-1;ch=getchar();}
4 while(ch>='0' && ch<='9'){x=x*10+ch-'0';ch=getchar();}
5 return x*f;
6 }
讀入優化
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsISPrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdsATOfd3bkFGazxCMx8VesATMfhHLlN3XnxCMwEzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-YWan5CM1UTO0MjY4UjM3EDZ1gzMzIDOjhTZlZ2N5YWNldDMz8CX2AzLchDMxIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjL3M3Lc9CX6MHc0RHaiojIsJye.gif)
1 inline void write(int x){
2 if(x<0) putchar('-'),x=-x;
3 if(x>9) write(x/10);
4 putchar(x%10+'0');
5 }
輸出優化
樹:
樹鍊剖分:http://www.cnblogs.com/SilverNebula/p/6025052.html
更完善的樹鍊剖分:
圖論:
二分圖比對-匈牙利算法:http://www.cnblogs.com/SilverNebula/p/6031340.html
計算幾何:
左轉 http://www.cnblogs.com/SilverNebula/p/6740955.html
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