Compilare: user.cpp: In function ‘int b_ford()’: user.cpp:583:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[nod].size();j++) ^ user.cpp:568:17: warning: unused variable ‘aleg’ [-Wunused-variable] int i,j,nod,aleg,nh; ^ user.cpp:568:22: warning: unused variable ‘nh’ [-Wunused-variable] int i,j,nod,aleg,nh; ^ user.cpp: In function ‘void bellmanFord()’: user.cpp:617:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:638:15: warning: overflow in implicit constant conversion [-Woverflow] aleg=oo; ^ user.cpp:634:20: warning: unused variable ‘v’ [-Wunused-variable] int aleg,i,v=1; ^ user.cpp: In function ‘void solve()’: user.cpp:657:7: warning: unused variable ‘i’ [-Wunused-variable] int i,aleg; ^ user.cpp:657:9: warning: unused variable ‘aleg’ [-Wunused-variable] int i,aleg; ^ user.cpp: In function ‘void reed()’: user.cpp:531:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bal2.in","r",stdin); ^ user.cpp:532:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&k); ^ user.cpp:537:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p); ^ user.cpp: In function ‘void solve()’: user.cpp:667:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bal2.out","w",stdout); ^