View Compilation Error

0_0_36547916_13419.cpp:25:13: error: 'Z' function uses 'auto' type specifier without trailing return type
 auto Z(int r) {return mat(r);}
             ^
0_0_36547916_13419.cpp:25:13: note: deduced return type only available with -std=c++1y or -std=gnu++1y
0_0_36547916_13419.cpp: In function 'int main()':
0_0_36547916_13419.cpp:46:20: error: 'I' was not declared in this scope
   int n,m;FOR_EACH(I,n,m,)cnt=0;
                    ^
0_0_36547916_13419.cpp:46:26: error: expected primary-expression before ')' token
   int n,m;FOR_EACH(I,n,m,)cnt=0;
                          ^
0_0_36547916_13419.cpp:46:26: error: 'FOR_EACH' was not declared in this scope