I have a problem with the segmentation fault. Look:

#include<fstream>
using namespace std;
int main(){
    int n,i,vector[10001],vectorcopy[10001];
    ifstream in("program.in");
    ofstream out("program.out");
    in>>n;
    for(i=1;i<=n;i++){
        in>>vector[i];
        vectorcopy[i]=vector[i];
    }
    return 0;}

And the debugger says: Program recived signal SIGSEGV, Segmentation fault

Please, tell me what to do!