Compilare: main.cpp: In function 'int match(std::vector<int>&, std::vector<std::vector<int> >&)': main.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<a.size();i++){ ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:103:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<init.size();i++) ~^~~~~~~~~~~~ main.cpp:111:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ans.size();i++) ~^~~~~~~~~~~