Compilare: user.cpp: In function ‘int main()’: user.cpp:104:33: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘ll {aka long long int}’ [-Wformat=] printf("%d: %d\n", i, pow(2,i)); ^ user.cpp:83:6: warning: unused variable ‘T’ [-Wunused-variable] int T; ^ user.cpp:85:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.in", "r", stdin); ^ user.cpp:86:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.out","w",stdout); ^