Compilare: user.cpp: In function ‘bool subsir(int, int)’: user.cpp:19:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, j = 0; i < A[a].size() && j < A[b].size(); j++) ^ user.cpp:19:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, j = 0; i < A[a].size() && j < A[b].size(); j++) ^ user.cpp:23:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == A[a].size()) ^ user.cpp: In function ‘int main()’: user.cpp:40:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(A[i].size()>dr||A[i].size()==dr&&x>A[i]) ^ user.cpp:40:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(A[i].size()>dr||A[i].size()==dr&&x>A[i]) ^ user.cpp:40:47: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(A[i].size()>dr||A[i].size()==dr&&x>A[i]) ^