Compilare: user.cpp: In function ‘int main()’: user.cpp:57:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); j++) { ^ user.cpp:70:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[i].size() < intr[i]) { ^ user.cpp:74:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[i].size() > intr[i]) { ^