Compilare: main.cpp: In function 'int main()': main.cpp:72:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int i=0;i<chains.size();i++) | ~^~~~~~~~~~~~~~ main.cpp:99:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for(int i=0;i<cycles.size();i++) | ~^~~~~~~~~~~~~~