Compilare: user.cpp: In function ‘int main()’: user.cpp:84:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < linii[i].size() && j < linii[0].size(); j++) ^ user.cpp:84:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < linii[i].size() && j < linii[0].size(); j++) ^ user.cpp:87:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j < linii[i].size() && j < linii[0].size()) { ^ user.cpp:87:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j < linii[i].size() && j < linii[0].size()) { ^ user.cpp:94:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < linii[ans].size() && j < linii[0].size(); j++) ^ user.cpp:94:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < linii[ans].size() && j < linii[0].size(); j++) ^ user.cpp:100:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (linii[i].size() > j && linii[0][j] == linii[i][j]) ^