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View Compilation Error

0_0_39131351_15339.cpp: In function 'int main()':
0_0_39131351_15339.cpp:30:9: error: 'memset' was not declared in this scope
   30 |         memset(ar, 0, sizeof(ar));
      |         ^~~~~~
0_0_39131351_15339.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<algorithm>
  +++ |+#include <cstring>
    3 | using namespace std;


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