Compilare: main.cpp: In function 'int main()': main.cpp:85:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<r.size();i++) { ~^~~~~~~~~ main.cpp:123:33: warning: 'colo' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<linie<<" "<<colo<<" "; ^~~ main.cpp:123:22: warning: 'linie' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<linie<<" "<<colo<<" "; ^~~ main.cpp:84:14: warning: 'c1' may be used uninitialized in this function [-Wmaybe-uninitialized] euler(c1); ^