Eroare de compilare: main.cpp:5:11: error: variable 'std::ifstream f' has initializer but incomplete type ifstream f("damesah.in"); ^ main.cpp:6:11: error: variable 'std::ofstream g' has initializer but incomplete type ofstream g("damesah.out"); ^ main.cpp: In function 'void backtr(int, std::vector<int>, int, std::vector<int>)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p.size();i++) ~^~~~~~~~~ main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1+i;j<p.size();j++) ~^~~~~~~~~ main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p.size();i++) ~^~~~~~~~~ Non zero exit status: 1