0_0_25452241_17265.c:1:1: error: expected identifier or '(' before '/' token
//#include<iostream>
^
0_0_25452241_17265.c:1:3: error: stray '#' in program
//#include<iostream>
^
0_0_25452241_17265.c:2:16: fatal error: cmath: No such file or directory
#include<cmath>
^
compilation terminated.
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