Compilare: main.cpp: In function 'void solve(std::vector<std::pair<int, int> >&, std::pair<int, int>, int, std::vector<int>&)': main.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for (int i = 0; i < v.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:14:9: warning: unused variable 'best' [-Wunused-variable] 14 | int best = 2000000000; | ^~~~ main.cpp: In function 'int main()': main.cpp:48:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 0; i < prevLevel.size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~