Compilare: main.cpp: In function 'void find_perm(std::vector<long long int>&, long long int)': main.cpp:36:8: warning: unused variable 'j' [-Wunused-variable] {int i,j; ^ main.cpp: In function 'long long int find_last(long long int)': main.cpp:99:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'long long int find_untill(long long int)': main.cpp:115:32: warning: unused variable 'j' [-Wunused-variable] int clone_x = x,nr_c = 0,i,j; ^ main.cpp: In function 'void find_perm(std::vector<long long int>&, long long int)': main.cpp:63:17: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] perm[i] = last;