Compilare: user.cpp: In function ‘void ve(short int, short int)’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<x[poz-1].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:53:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<x[i-1].size();j++) ^ user.cpp:76:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<x[k].size();j++) ^