Compilare: user.cpp: In function ‘void Read(comp*, int)’: user.cpp:60:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^ user.cpp: In function ‘void Read2(comp*)’: user.cpp:68:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &L); ^ user.cpp:72:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^ user.cpp: In function ‘int main()’: user.cpp:83:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("input", "r", stdin); ^ user.cpp:84:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("output", "w", stdout); ^ user.cpp:86:158: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &T), N = 1 << 16, A = new comp[N + 1], B = new comp[N + 1], C = new comp[N + 1], D = new comp[N + 1], E = new comp[N + 1], ans = new comp[N + 1]; ^