Compilare: main.cpp: In function 'void BFS()': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<v[vr].size();k++) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&x); ^ main.cpp:43:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&a,&b); ^ main.cpp:49:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&vf); ^