Compilare: user.cpp: In function ‘std::vector<std::__cxx11::basic_string<char> > justifyFormatting(std::vector<std::__cxx11::basic_string<char> >&, int)’: user.cpp:14:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p1<words.size()) ^ user.cpp:17:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((p2<((int)words.size()-1))&&(sum+words[p2+1].size()+1<=K+1)) ^ user.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p2==p1&&p2!=words.size()-1) ^ user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ans[ans.size()-1].size()<K) ^ user.cpp:26:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p2==words.size()-1) ^ user.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<words[i].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:60:9: warning: unused variable ‘N’ [-Wunused-variable] int N, K; ^ user.cpp:61:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&K); ^ user.cpp:62:21: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,1000,IN); ^