Compilare: main.cpp: In function 'int main()': main.cpp:68:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<el>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int x=0;x<v.size();++x) | ~^~~~~~~~~ main.cpp:79:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<el>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int x=0;x<v.size();++x) | ~^~~~~~~~~ main.cpp:91:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<el>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for(int x=0;x<v.size();++x) | ~^~~~~~~~~