Compilare: user.cpp: In function ‘int main()’: user.cpp:153:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trafic.in", "r", stdin); ^ user.cpp:154:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trafic.out", "w", stdout); ^ user.cpp:156:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &graf.N, &M, &G); ^ user.cpp:162:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &a[i], &b[i], &c[i]); ^ user.cpp: In function ‘double get_min(int, int, int)’: user.cpp:148:12: warning: ‘ras’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ras; ^