Compilare: user.cpp: In function ‘int main()’: user.cpp:86:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (g * (dp[nod][dp[nod].size () - 1]) > dp[nod].size () * orn) { ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ user.cpp:93:94: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (g * (dp[nod][dp[nod].size () - 1] - (dp[nod][dp[nod].size () - 1] - dp[nod][l])) > (dp[nod].size () - l - 1) * orn) { ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘char advance()’: user.cpp:13:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, fin); ^