Compilare: main.cpp: In function 'int main()': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<t.size();i++){ ~^~~~~~~~~ main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<d.size();i++){ ~^~~~~~~~~