Compilare: user.cpp: In function ‘int main()’: user.cpp:44:26: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if ((k-(n%k))>pr[i]==0) {p=pr[i]; while (k-(n%k)>=p) y=y+((k-(n%k))/p),p=p*pr[i]; } ^ user.cpp:33:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.in","r",stdin); ^ user.cpp:34:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana.out","w",stdout); ^ user.cpp:35:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); nm=1000000; numereprime(); ^ user.cpp:38:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %d",&n,&k); sol=1LL; ^