Compilare: user.cpp: In function ‘void solve()’: user.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<=n; ++i) ^ user.cpp: In function ‘void read()’: user.cpp:31:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:33:59: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lf %lf", &puncte[i].x, &puncte[i].y); ^