Compilare: user.cpp: In function ‘int main()’: user.cpp:51:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < p.size(); i ++) ^ user.cpp:40:9: warning: unused variable ‘mn’ [-Wunused-variable] int mn = 0; ^ user.cpp:43:9: warning: unused variable ‘nr2’ [-Wunused-variable] int nr2 = 0, nr3 = 0; ^ user.cpp:43:18: warning: unused variable ‘nr3’ [-Wunused-variable] int nr2 = 0, nr3 = 0; ^