Compilare: user.cpp: In function ‘int main()’: user.cpp:99:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < 1000 && i < sol.size(); ++ i) ^ user.cpp:61:9: warning: unused variable ‘h2A’ [-Wunused-variable] int h2A = 0; ^ user.cpp:63:9: warning: unused variable ‘C2N’ [-Wunused-variable] int C2N = 1; ^ user.cpp:76:9: warning: unused variable ‘h2B’ [-Wunused-variable] int h2B = 0; ^