Compilare: user.cpp: In function ‘int main()’: user.cpp:95:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[i].size(); ++j) ^ user.cpp:80:16: warning: unused variable ‘aux’ [-Wunused-variable] point nou, aux, sol; ^ user.cpp:78:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out", "w", stdout); ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:29:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ user.cpp: In function ‘int main()’: user.cpp:114:18: warning: ‘sol.point::y’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (sol.x != last[sol.x][sol.y].x || sol.y != last[sol.x][sol.y].y ) ^ user.cpp:114:18: warning: ‘sol.point::x’ may be used uninitialized in this function [-Wmaybe-uninitialized]