View Compilation Error

0_0_35962134_25824.cpp:5:18: error: unable to find numeric literal operator 'operator""a00000'
 const int N=51,M=26a00000;
                  ^
0_0_35962134_25824.cpp:5:18: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_35962134_25824.cpp:6:11: error: size of array 'str' is not an integral constant-expression
 char str[M];
           ^
0_0_35962134_25824.cpp: In function 'void get_fail()':
0_0_35962134_25824.cpp:41:2: error: 'data' was not declared in this scope
  data[1]=tree;
  ^