退火：

input:
15
195.782 196.660
197.947 197.269
195.523 198.966
197.086 197.688
199.306 196.624
197.807 198.366
196.240 197.883
197.524 195.807
199.427 198.738
196.843 197.834
197.378 199.887
195.116 197.668
196.738 197.127
197.542 195.239
198.187 198.844
output:
293.67

input:
15
198.654 198.777
196.277 197.914
198.587 198.259
198.577 196.178
197.316 196.790
198.584 198.470
198.382 195.869
196.144 195.220
198.284 197.731
199.305 198.119
199.532 199.864
199.672 198.850
198.716 196.527
197.578 199.959
199.719 198.147
output:
290.55

并且请求撤下所有dfs和退火题解