Compilare: user.cpp: In function ‘void citire()’: user.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i <= n; ++i) ^ user.cpp:56:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= m; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:70:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n; ++i) ^ user.cpp:80:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < leg[i].size(); ++j) ^ user.cpp:92:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i <= n; ++i) ^