View Compilation Error

0_0_19739965_32299.cpp: In function 'int main()':
0_0_19739965_32299.cpp:10:22: error: 'scanf' was not declared in this scope
      scanf("%d%*c",&n);
                      ^
0_0_19739965_32299.cpp:13:23: error: 'getchar' was not declared in this scope
      while((c=getchar())!='\n'){
                       ^
0_0_19739965_32299.cpp:27:52: error: 'puts' was not declared in this scope
       puts(a[4]>2 && a[5]>7 && a[5]<17 ? "YES":"NO"); 
                                                    ^
0_0_19739965_32299.cpp:30:15: error: expected '}' at end of input
       return 0;
               ^