Compilare: user.cpp: In function ‘void Read()’: user.cpp:44:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:47:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp: In function ‘int main()’: user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sprim.in", "r", stdin); ^ user.cpp:81:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sprim.out", "w", stdout); ^ user.cpp: In function ‘void FP(int, int, int&, int&)’: user.cpp:16:17: warning: iteration 1003u invokes undefined behavior [-Waggressive-loop-optimizations] if(nrp[i] == 0 && x%i==0) ^ user.cpp:15:5: note: containing loop for(int i=2; i<=NMax; ++i) ^