Compilare: user.cpp: In function ‘void Dijkstra(int)’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp: In function ‘bool BFS()’: user.cpp:52:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g0[node].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:77:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[i].size();j++) ^ user.cpp:84:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g0[sink].size();i++){ ^ user.cpp:100:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g0[i].size();j++) ^ user.cpp:66:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asfalt.in","r",stdin); ^ user.cpp:67:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asfalt.out","w",stdout); ^ user.cpp:69:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&m,&source,&sink); ^ user.cpp:71:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a,&b,&c); ^