Compilare: user.cpp: In function ‘bool bfs(int, int)’: user.cpp:290:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[x].size();i++) ^ user.cpp: In function ‘bool bfs_t(int, int)’: user.cpp:317:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<GT[x].size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:341:12: warning: unused variable ‘nev’ [-Wunused-variable] int nev=0,j; ^ user.cpp:354:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp: In function ‘bool bf_optim(int)’: user.cpp:376:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<V[x][y].size();i++) ^ user.cpp:363:15: warning: unused variable ‘j’ [-Wunused-variable] int x,y,i,j,nod,nv; ^ user.cpp: In function ‘void solve_2()’: user.cpp:407:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<lm.size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:337:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","w",stdout); ^ user.cpp: In function ‘void read()’: user.cpp:266:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in","rt",stdin); ^ user.cpp:268:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:271:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘void solve_2()’: user.cpp:398:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","wt",stdout); ^