Compilare: user.cpp: In function ‘int main()’: user.cpp:80:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[i].size(); j++) ~~^~~~~~~~~~~~~ user.cpp:32:15: warning: unused variable ‘x’ [-Wunused-variable] int a, b, x, maxim, start1, lim = 0, type; ^ user.cpp:32:18: warning: unused variable ‘maxim’ [-Wunused-variable] int a, b, x, maxim, start1, lim = 0, type; ^~~~~ user.cpp:113:32: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << ans << "\n"; ^~~~