Compilare: main.cpp: In function 'int main()': main.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<=n && (n+1-ind) != (k-sol.size())){ ~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sol.size()<k){ ~~~~~~~~~~^~ main.cpp:78:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ~^~~~~~~~~~~