Compilare: main.cpp: In function 'void afis(stare)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.istoric.size();++i) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve(stare)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<x.poz.size()-1;++i) ~^~~~~~~~~~~~~~~ main.cpp:36:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1;j<x.poz.size();++j) ~^~~~~~~~~~~~~