Compilare: user.cpp: In function ‘int main()’: user.cpp:71:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^ user.cpp:72:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^ user.cpp:73:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &A, &B); ^ user.cpp: In function ‘void process()’: user.cpp:26:48: warning: iteration 50003u invokes undefined behavior [-Waggressive-loop-optimizations] for (int i=2; i<=MAX_PRIM; ++i) if (p[i]!=1) prim[++k]=i; ^ user.cpp:26:24: note: containing loop for (int i=2; i<=MAX_PRIM; ++i) if (p[i]!=1) prim[++k]=i; ^ user.cpp: In function ‘void solve()’: user.cpp:58:36: warning: ‘value’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (vl[i]==max) ++value; ^