Compilare: main.cpp: In function 'int Solve(std::vector<int>, int)': main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= a.size(); ++ i ) ~~^~~~~~~~~~~ main.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = k; i <= a.size(); ++ i ) { ~~^~~~~~~~~~~ main.cpp:45:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= a.size(); ++ i ) { ~~^~~~~~~~~~~