Compilare: user.cpp: In function ‘void bford(int, int)’: user.cpp:45:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<B[act].size(); i++) ^ user.cpp: In function ‘int BF()’: user.cpp:70:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<B[nod].size(); i++) ^ user.cpp: In function ‘int ok(int)’: user.cpp:102:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<B[n].size(); i++) ^ user.cpp: In function ‘void read()’: user.cpp:18:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&g); ^ user.cpp:22:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&A[i].a,&A[i].b,&A[i].val); ^ user.cpp: In function ‘int main()’: user.cpp:130:32: 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:131:34: 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); ^