Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:10:19: 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:50:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v[w[tc][i]].size(); j++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:21:33: warning: variable 'elem' set but not used [-Wunused-but-set-variable] int n , i , a , b , vecin , elem , el , el2 , j , maxi , tc; ^~~~ main.cpp:22:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^ main.cpp:39:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d %d",&a,&b); ^