doll.cpp: In function 'int solve(std::vector<int>)':
doll.cpp:11:20: 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+=2)
| ~~^~~~~~~~~~
doll.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
15 | for(int i = 1; i < a.size(); i+=2)
| ~~^~~~~~~~~~
doll.cpp:20:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
20 | if(X.size() < -(trigger+1))
| ~~~~~~~~~^~~~~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:29:7: warning: unused variable 'N' [-Wunused-variable]
29 | int N = A.size();
| ^