0_0_19791376_16815.cpp: In function 'int main()': 0_0_19791376_16815.cpp:16:19: error: 'N' was not declared in this scope while (cin >> N){ ^ 0_0_19791376_16815.cpp:19:16: error: 'A' was not declared in this scope memset(A,0,sizeof(A)); ^