Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[nod].size();i++){ ^ user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( i+1<s[nod].size() && s[nod][i]+s[nod][i+1]>k ){ ^ user.cpp:26:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( i<s[nod].size() && s[nod][i]>k ){ ^ user.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<s[nod].size()){ ^ user.cpp: In function ‘int main()’: user.cpp:39:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:41:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^