Compilare: user.cpp: In function ‘void Build_Hash()’: user.cpp:28:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, val = 0, p = 1; ^ user.cpp: In function ‘void Read()’: user.cpp:21:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d ", &n, &m, &l, &k); ^ user.cpp:22:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", S); ^ user.cpp: In function ‘void Solve()’: user.cpp:81:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", T); ^