Compilare: user.cpp: In function ‘int main()’: user.cpp:29:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s[i].size();++j) ^ user.cpp:49:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!nume[i].empty()&&nume[i].size()==k-2*ct-1) ^ user.cpp:51:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=nume[i].top()+1;j<s[i].size();++j) ^ user.cpp:71:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nume[i].size()==k-2*ct+1) ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nume[i].size()==k-2*ct) ^