Compilare: main.cpp: In function 'void dfs(int)': main.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:86:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < sl[i].size() ; j++) ~~^~~~~~~~~~~~~~ main.cpp:44:21: warning: unused variable 'nod' [-Wunused-variable] int n,m,i,x,y,j,nod,vecin; ^~~ main.cpp:45:30: 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:47:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^