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#include <iostream>
#include <vector>
using namespace std;
int main(int argc, char** argv) {
    double b1[]={1,2,3,4,5};
    vector<int> b(b1,b1+sizeof(b1)/sizeof(int));
    b.insert(b.begin(),1);
    cout<<b[0]<<endl;
    return 0;
}