Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > transformToChessLine(const string&, bool)': main.cpp:95:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < line.length(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:97:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(line[i] != expectedChar) ^ main.cpp:110:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < wrong0.size(); i++) ~~^~~~~~~~~~~~~~~