View Compilation Error

0_0_30672984_9658.cpp: In function 'int main(int, const char**)':
0_0_30672984_9658.cpp:34:28: error: unable to find numeric literal operator 'operator""z'
    scanf("%d%d%d", &x, &y, 8z);
                            ^
0_0_30672984_9658.cpp:34:28: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes