Compilare: main.cpp: In function 'double getDistance(std::vector<std::pair<double, double> >&)': main.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < points.size(); ++i) { ~~^~~~~~~~~~~~~~~ main.cpp:31:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < points.size(); ++j) { ~~^~~~~~~~~~~~~~~ main.cpp:42:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = middle + 1; j < points.size(); ++j) { ~~^~~~~~~~~~~~~~~ main.cpp:60:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < points.size(); ++i) { ~~^~~~~~~~~~~~~~~