Compilare: user.cpp: In function ‘int main()’: user.cpp:30:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l = 0;p < S[j].length() && l < S[i].length(); l++ ) p+=S[i][l] == S[j][p]; ^ user.cpp:30:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l = 0;p < S[j].length() && l < S[i].length(); l++ ) p+=S[i][l] == S[j][p]; ^ user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == S[j].length()) B[j] = 1; ^