Compilare: main.cpp: In function 'int level_graph(int, int)': main.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int, int)': main.cpp:40:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;start[nod]<v[nod].size();start[nod]++){ ~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:78:30: 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:80:39: 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:98:23: warning: 'poz' may be used uninitialized in this function [-Wmaybe-uninitialized] sol = flux (1,poz); ^