Compilare: main.cpp: In function 'void Read()': main.cpp:33:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cuv.size(); ++ i ) { ~~^~~~~~~~~~~~ main.cpp:47:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < length; ++ i ) { ~~^~~~~~~~ main.cpp: In function 'void Solve()': main.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < length; ++ i ) { ~~^~~~~~~~ main.cpp:70:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = length; i < text.size(); ++ i ) { ~~^~~~~~~~~~~~~