Compilare: user.cpp: In function ‘void bf()’: user.cpp:26:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[a].size();i++) ^ user.cpp: In function ‘int dijkstra()’: user.cpp:88:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[poz].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:116:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d",&n,&m,&s,&dr); ^ user.cpp:118:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d",&a,&b,&ab,&cc); ^