Compilare: user.cpp: In function ‘int main()’: user.cpp:119:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<pct[i].size(); j++) ^ user.cpp:131:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<pct[i].size(); ++j){ ^ user.cpp:136:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<noduri.size(); ++j) ^