Compilare: main.cpp: In function 'int main()': main.cpp:35:50: warning: too many arguments for format [-Wformat-extra-args] printf("lld", ((i << 1) + 1) * ((i << 1) + 1)); ^ main.cpp:19:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prim.in", "r", stdin); ^ main.cpp:20:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prim.out", "w", stdout); ^ main.cpp:22:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &k); ^