Compilare: main.cpp: In function 'void read()': main.cpp:25:81: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld%lld%lld", &corner.x, &corner.y, &socks.x, &socks.y, &ts); ^ main.cpp: In function 'int main()': main.cpp:97:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rufe.in","r",stdin); ^ main.cpp:98:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rufe.out","w",stdout); ^