Compilare: user.cpp: In function ‘double getArea(std::vector<std::pair<int, int> >&)’: user.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Points.size() - 1; ++i) ~~^~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘bool checkIntersect(std::vector<std::pair<int, int> >&, std::pair<int, int>&)’: user.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < Points.size() - 1; ++i){ ~~^~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < B.size() && !found; ++i) ~~^~~~~~~~~~ user.cpp:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < A.size() && !found; ++i) // what if A > B ~~^~~~~~~~~~