Compilare: main.cpp: In function 'int df1(int, int, int)': main.cpp:11:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(i=0;i<vec[k].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void df2(int, int)': main.cpp:20:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(i=0;i<vec[k].size();i++) | ~^~~~~~~~~~~~~~