Compilare: user.cpp: In function ‘void Read()’: user.cpp:12:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d ", &n, &m, &x, &y); ^ user.cpp:17:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &A[i][j]); ^ user.cpp: In function ‘void Zone2()’: user.cpp:65:31: warning: ‘nc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( nl % 2 == 0 && nc % 2 == 0 ) ^ user.cpp: In function ‘void Zone3()’: user.cpp:90:31: warning: ‘nc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( nl % 2 == 0 && nc % 2 == 0 ) ^ user.cpp: In function ‘void Zone4()’: user.cpp:115:31: warning: ‘nc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( nl % 2 == 0 && nc % 2 == 0 ) ^ user.cpp: In function ‘void Solve()’: user.cpp:123:20: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] int best = -1, nr, k; ^