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View Compilation Error

0_0_30390944_2472.cpp: In function 'int main()':
0_0_30390944_2472.cpp:66:32: error: 'pow' was not declared in this scope
   int v=pow((s1-d1)*(s1-d1),0.5)+pow((s2-d2)*(s2-d2),0.5);
                                ^


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