Compilare: main.cpp: In function 'bool cupleaza(int)': main.cpp:13:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0; i < v[k].size(); i ++) | ~~^~~~~~~~~~~~~ main.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i = 0; i < v[k].size(); i ++) | ~~^~~~~~~~~~~~~