Compilare: main.cpp: In function 'long long int applyRec(std::vector<std::pair<long long int, int> >)': main.cpp:59:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); ++i) { ~~^~~~~~~~~~~~ main.cpp: In function 'void moveRoot(int, int)': main.cpp:94:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graph[nod].size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:109:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sons.size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp:119:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sons.size(); ++i) { ~~^~~~~~~~~~~~~