Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[nod].size();j++){ ~^~~~~~~~~~~~~~ user.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[nod].size();j++){ ~^~~~~~~~~~~~~~ user.cpp:14:12: warning: unused variable ‘j’ [-Wunused-variable] int fiu, j; ^ user.cpp: In function ‘int main()’: user.cpp:81:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(q=0;q<g[rad].size();q++) ~^~~~~~~~~~~~~~ user.cpp:90:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<cc.size();i++){ ~^~~~~~~~~~ user.cpp:56:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &n, &m); ^ user.cpp:58:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &x, &y); ^