Compilare: main.cpp: In function 'int main()': main.cpp:49:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < w.size(); i++) ~~^~~~~~~~~~ main.cpp:51:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 2; j <= w.size(); j++) ~~^~~~~~~~~~~ main.cpp:52:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = j - 1; i < w.size(); i++) ~~^~~~~~~~~~ main.cpp:56:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k - i < sum.size() && i <= k) ~~~~~~^~~~~~~~~~~~