Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:27:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<layer[i].size(); ++j) ^ user.cpp:30:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k=0; k<T[x].size(); ++k) ^ user.cpp: In function ‘void arrange(std::vector<int>&, int*)’: user.cpp:48:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v.size(); ++i) ^ user.cpp: In function ‘void decompose()’: user.cpp:70:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<layer[i].size(); ++j) ^ user.cpp:75:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k=0; k<T[x].size(); ++k) ^ user.cpp:77:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (T[x][k] != f[x] && which == 0 || value[which] < value[T[x][k]]) ^ user.cpp:100:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j < layer[i].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:151:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<c.length(); ++i) ^