View Compilation Error

0_0_37615866_23552.cpp: In function 'int main()':
0_0_37615866_23552.cpp:34:24: error: unable to find numeric literal operator 'operator""n'
    for(int i=cnt-11;i>=1n;--i)
                        ^
0_0_37615866_23552.cpp:34:24: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes