Compilare: main.cpp: In function 'void compute(std::vector<std::pair<int, std::pair<int, int> > >&, const std::vector<std::pair<int, int> >&, int)': main.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < values.size() and values[p].first <= (element.first | (1 << bit))) ~~^~~~~~~~~~~~~~~ main.cpp:82:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < biggestBad.size() and biggestBad[p].first < element.first) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= values.size(); ++ i) ~~^~~~~~~~~~~~~~~~ In file included from /usr/include/c++/6/cassert:44:0, from main.cpp:3: main.cpp: In function 'int main()': main.cpp:111:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(values.size() == n); ~~~~~~~~~~~~~~^~~~