Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<arb[nod].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:88:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:112:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v[nod].size() ; j++){ ~~^~~~~~~~~~~~~~~ main.cpp:66:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&n,&m,&k,&q); ^ main.cpp:71:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^ main.cpp:77:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&x,&y,&z); ^ main.cpp:146:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&a , &b , &ti); ^