Compilare: user.cpp: In function ‘void bellman(int, int)’: user.cpp:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graf[crt].size(); i++) ^ user.cpp: In function ‘bool dijkstra(int, int)’: user.cpp:59:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graf[ crt_nod ].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:88:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y, z, w; ^ user.cpp:86:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fmcm.in","r",stdin); ^ user.cpp:87:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fmcm.out","w",stdout); ^ user.cpp:89:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &st, &fin); ^ user.cpp:92:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &x, &y, &z, &w); ^