doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:11:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | for(int i=0;i<A.size();i++){
| ~^~~~~~~~~
doll.cpp:18:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for(int i=0;i<A.size()-1;i++){
| ~^~~~~~~~~~~
doll.cpp:7:6: warning: unused variable 'N' [-Wunused-variable]
7 | int N = A.size();
| ^