Compilare: main.cpp: In function 'int main()': main.cpp:11:25: warning: null argument where non-null required (argument 1) [-Wnonnull] if (a < 0) printf(0) ; ^ main.cpp:7:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("expozitie.in" , "r" , stdin); ^ main.cpp:8:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("expozitie.out" , "w" , stdout) ; ^ main.cpp:9:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld" , &n , &d , &k); ^