Compilare: main.cpp: In function 'int main()': main.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (j = 0; j < dv.size(); j++) | ~~^~~~~~~~~~~ main.cpp:67:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (int k = j; k < dv.size(); k++) | ~~^~~~~~~~~~~ main.cpp:70:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for (j = 0; j < dv2.size() and dv2[j] * dv2[j] < (i * i); j++) | ~~^~~~~~~~~~~~ main.cpp:75:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | if (j < dv2.size() and dv2[j] * dv2[j] == i * i) | ~~^~~~~~~~~~~~