0_0_29355856_6509.cpp: In function 'int main()': 0_0_29355856_6509.cpp:4:15: error: 'scanf' was not declared in this scope scanf("%d",&n); ^ 0_0_29355856_6509.cpp:8:31: error: 'printf' was not declared in this scope printf("%d\n",(m+1)*(1<<m)/4); ^