Compilare: main.cpp: In function 'int main()': main.cpp:52:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("recurenta2.in" , "r" , stdin); ^ main.cpp:53:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("recurenta2.out" , "w" , stdout); ^ main.cpp:55:71: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld%lld%lld%lld" , &a , &b , &c , &x1 , &x2 , &pw); ^