Compilare: main.cpp: In function 'int main()': main.cpp:58:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (i=1; i<l.size (); i++) | ~^~~~~~~~~~ main.cpp:74:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (j=0; j<l.size (); j++) | ~^~~~~~~~~~