Compilare: main.cpp: In function 'int main()': main.cpp:106:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for (int j = 0; j < chain.size(); ++j) { | ~~^~~~~~~~~~~~~~ main.cpp:87:13: warning: variable 'destination' set but not used [-Wunused-but-set-variable] 87 | int destination; | ^~~~~~~~~~~ main.cpp:89:28: warning: unused variable 'distance' [-Wunused-variable] 89 | vector<long long>& distance = (i == 0) ? distanceA : ((i == 1) ? distanceB : distanceC); | ^~~~~~~~