Compilare: user.cpp: In function ‘int main()’: user.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<lista[u].size();i++) ~^~~~~~~~~~~~~~~~ user.cpp:21:15: warning: variable ‘costu’ set but not used [-Wunused-but-set-variable] int i,u,v,costu,costv; ^~~~~ user.cpp: In function ‘void citire()’: user.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:15:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n1,&n2,&c); ^ user.cpp: In function ‘int main()’: user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin); ^ user.cpp:23:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out","w",stdout); ^