Compilare: main.cpp: In function 'int verificat(str)': main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:90: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if ((value.first == p.first && value.second == p.second) || value.second == p.first && value.first == p.second) ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~