dna.cpp:6:1: error: 'string' does not name a type; did you mean 'stdin'?
6 | string aa, bb;
| ^~~~~~
| stdin
dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:9:2: error: 'aa' was not declared in this scope; did you mean 'a'?
9 | aa = a, bb = b;
| ^~
| a
dna.cpp:9:10: error: 'bb' was not declared in this scope; did you mean 'b'?
9 | aa = a, bb = b;
| ^~
| b
dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:31:6: error: 'aa' was not declared in this scope
31 | if(aa[i] != bb[i]){
| ^~
dna.cpp:31:15: error: 'bb' was not declared in this scope
31 | if(aa[i] != bb[i]){
| ^~