Compilare: user.cpp: In function ‘bool cuplaj(int)’: user.cpp:16:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < v[knot].size(); i ++) { ^ user.cpp:26:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < v[knot].size(); i ++) { ^ user.cpp: In function ‘int main()’: user.cpp:48:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < w[i].size(); j ++) { ^ user.cpp:50:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (w[i].size() == r) { ^