0_0_30326588_7514.cpp: In function 'int main()': 0_0_30326588_7514.cpp:18:29: error: 'memset' was not declared in this scope memset(h,0,sizeof(h)); ^ 0_0_30326588_7514.cpp:23:23: error: 'sort' was not declared in this scope sort(a+1,a+n+1); ^