Compilare: main.cpp: In function 'int main(int, const char**)': main.cpp:56:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; (1<<i) <= n; ++ i) // Luam toti biti lui p la rand ~~~~~~~^~~~ main.cpp:48:24: warning: unused variable 'p' [-Wunused-variable] unsigned int i, n, p; ^ main.cpp:49:15: warning: unused variable 'a' [-Wunused-variable] long long a, sol = 1; ^ main.cpp:49:18: warning: unused variable 'sol' [-Wunused-variable] long long a, sol = 1; ^~~ main.cpp:46:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin); ^ main.cpp:47:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out","w",stdout); ^ main.cpp:50:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^