Compilare: main.cpp:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In function 'int main()': main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); ++i) ~~^~~~~~~~~~ main.cpp:38:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < b.size(); ++j) ~~^~~~~~~~~~ main.cpp: In function 'int64_t Solve(std::vector<Segm>, std::vector<Segm>)': main.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int is = 0; is < a.size(); ++is) ~~~^~~~~~~~~~ main.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int ij = is + 1; ij < a.size(); ++ij) ~~~^~~~~~~~~~ main.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < b.size(); ++i) ~~^~~~~~~~~~