Compilare: user.cpp: In function ‘int main()’: user.cpp:13:17: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((n/k)&1 == 1) printf("Santa Klaus\n"); ^ user.cpp:14:22: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else if((n/k)&1 == 1 && n%k > 0) printf("Santa Klaus\n"); ^ user.cpp:6:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mere.in", "r", stdin); ^ user.cpp:7:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mere.out", "w", stdout); ^ user.cpp:9:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:12:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^