Compilare: main.cpp: In function 'int main()': main.cpp:109:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for (int j = 0; j < chain.size(); ++j) { | ~~^~~~~~~~~~~~~~ main.cpp:90:13: warning: variable 'destination' set but not used [-Wunused-but-set-variable] 90 | int destination; | ^~~~~~~~~~~ main.cpp:92:28: warning: unused variable 'distance' [-Wunused-variable] 92 | vector<long long>& distance = (i == 0) ? distanceA : ((i == 1) ? distanceB : distanceC); | ^~~~~~~~