Compilare: main.cpp: In function 'int main()': main.cpp:43:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.in","r",stdin); ^ main.cpp:44:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.out","w",stdout); ^ main.cpp:47:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ main.cpp: In function 'void ciur()': main.cpp:15:15: warning: iteration 100001 invokes undefined behavior [-Waggressive-loop-optimizations] if(c[i]==0) ~~~^ main.cpp:13:17: note: within this loop for(ll i=3;i<=nmax;i+=2) ^ main.cpp: In function 'int main()': main.cpp:63:19: warning: 'indmin' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<indmin<<' '<<nrma<<' '<<ans<<'\n'; ^~~