Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:86: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] std::ifstream I("secvente.in");std::ofstream O("secvente.out");int r[4],n,x,j,i;main(){for(i=1;i<4;i++){I>>n;long long s=0;r[0]=r[1]=r[2]=0;for(j=1;j<=n;j++){I>>x;s+=x;s%=3;r[x%3]=1;}if(s!=0)O<<n-2+r[s];else O<<n;O<<"\n";}} ^