Compilare: user.cpp: In function ‘void read()’: user.cpp:17:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:21:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n , &m); ^ user.cpp:25:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x , &y , &cost); ^ user.cpp: In function ‘int main()’: user.cpp:79:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^ user.cpp:76:28: warning: ‘nod_smecher’ may be used uninitialized in this function [-Wmaybe-uninitialized] t[ce_adaug]=nod_smecher; ^ user.cpp:74:29: warning: ‘ce_adaug’ may be used uninitialized in this function [-Wmaybe-uninitialized] vizitati[++loc]=ce_adaug; ^