Compilare: main.cpp: In function 'int bfs(int)': main.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[q.front()].size();i++){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:29:40: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] }else if((x[q.front()]^x[vecin.next]!=vecin.xo)){ ~~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:10: warning: statement has no effect [-Wunused-value] for(t;t>0;t--){ ^ main.cpp:44:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&t); ^ main.cpp:46:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ main.cpp:48:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&i,&j,&xo); ^