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View Compilation Error

0_0_39388137_10221.cpp: In function 'double Kruskal()':
0_0_39388137_10221.cpp:35:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   35 |     sort(e,e+cunt,cmp);///按从小到大对边进行排序
      |     ^~~~
      |     sqrt


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