Compilare: main.cpp: In member function 'int DSU::value(int, int)': main.cpp:81:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(i = 0 ; xs[i]==ys[i] && i < xs.size() && i < ys.size(); i++); | ~~^~~~~~~~~~~ main.cpp:81:56: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(i = 0 ; xs[i]==ys[i] && i < xs.size() && i < ys.size(); i++); | ~~^~~~~~~~~~~ main.cpp:83:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | if(i == xs.size()){ | ~~^~~~~~~~~~~~ main.cpp:87:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | }else if( i == ys.size()){ | ~~^~~~~~~~~~~~