Compilare: main.cpp: In function 'bool Pot1()': main.cpp:18:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.size(); ++i) if (x[i] == '1') return true; ~~^~~~~~~~~~ main.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.size() - 1; ++i) if (x[i] == '1') return true; ~~^~~~~~~~~~~~~~ main.cpp: In function 'bool Pot2()': main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.size(); ++i) if (x[i] == '0') return true; ~~^~~~~~~~~~ main.cpp: In function 'void rezolva_2()': main.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.size(); ++i) ~~^~~~~~~~~~ main.cpp:84:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p == x.size() - 1) ~~^~~~~~~~~~~~~~~ main.cpp:90:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = p + 2; i < x.size(); ++i) x1[i] = '1'; ~~^~~~~~~~~~ main.cpp:104:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = p + 1; i < x.size(); ++i) ~~^~~~~~~~~~