Compilare: user.cpp: In function ‘void rotesc_dr(int, int)’: user.cpp:30:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nr].size(); i++ ){ ^ user.cpp: In function ‘int solve(int)’: user.cpp:42:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i < v[nr].size(); i++ ){ ^ user.cpp: In function ‘int cadran(int, int)’: user.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type] } ^