Compilare: main.cpp: In function 'int main()': main.cpp:33:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(int i=1;i<v.size()&& ok;i++) | ~^~~~~~~~~ main.cpp:31:5: warning: unused variable 'nr' [-Wunused-variable] 31 | int nr=0,ok=1,nr1,nr2; | ^~ main.cpp:31:15: warning: unused variable 'nr1' [-Wunused-variable] 31 | int nr=0,ok=1,nr1,nr2; | ^~~ main.cpp:31:19: warning: variable 'nr2' set but not used [-Wunused-but-set-variable] 31 | int nr=0,ok=1,nr1,nr2; | ^~~