View Compilation Error

0_0_29963947_20256.cpp: In function 'int main()':
0_0_29963947_20256.cpp:36:54: error: request for member 'begin' in 'cnt', which is of non-class type 'int'
                 for(map<int, int>::iterator it = cnt.begin(); it != cnt.end(); ++it){
                                                      ^
0_0_29963947_20256.cpp:36:73: error: request for member 'end' in 'cnt', which is of non-class type 'int'
                 for(map<int, int>::iterator it = cnt.begin(); it != cnt.end(); ++it){
                                                                         ^
0_0_29963947_20256.cpp:44:20: error: invalid types 'int[int]' for array subscript
             ++cnt[a];
                    ^