Compilare: main.cpp: In function 'void solve()': main.cpp:68:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (ind = 0; ind < nr.size(); ind++) ~~~~^~~~~~~~~~~ main.cpp:72:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (ind = 0; ind < nr.size(); ind++) ~~~~^~~~~~~~~~~ main.cpp:81:56: warning: 'p2ales' may be used uninitialized in this function [-Wmaybe-uninitialized] g << cate << ' ' << p1ales << ' ' << p2ales << '\n'; ^~~~ main.cpp:81:39: warning: 'p1ales' may be used uninitialized in this function [-Wmaybe-uninitialized] g << cate << ' ' << p1ales << ' ' << p2ales << '\n'; ^~~