Compilare: main.cpp: In function 'int pozans(int, int)': main.cpp:8:30: warning: unused variable 'sm' [-Wunused-variable] long long step(1 << 20), sm(0), ans(0) ; ^~ main.cpp: In function 'int main()': main.cpp:47:30: warning: unused variable 'a' [-Wunused-variable] long long x, y, z, w, u, a ; ^ main.cpp:44:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("livada3.in", "r", stdin) ; ^ main.cpp:45:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("livada3.out", "w", stdout) ; ^