Compilare: user.cpp: In function 'void ReadData()': user.cpp:27: warning: unused variable 'x1' user.cpp:27: warning: unused variable 'y1' user.cpp:27: warning: unused variable 'x2' user.cpp:27: warning: unused variable 'y2' user.cpp: In function 'void Fill(int, int)': user.cpp:72: warning: comparison between signed and unsigned integer expressions user.cpp:72: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void Solve()': user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp:88: warning: comparison between signed and unsigned integer expressions