tong so nguyen to

{

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}


program tong_so_nguyen_to;
uses crt;
var a: array[1..10] of integer;
    i, x, n, dem, s: integer;
begin
    writeln ('Nhap so phan tu mang: '); readln(n); { 5 }
    writeln ('Nhap cac phan tu cua mang'); 
    for i:=1 to n do 
        begin 
            write('a[',i,']='); readln(a[i]);
        end { 10 20 30 40 50 }
    dem:=0; 
    s:=0;
    
    while i<>n do 
        begin 
            for i:=1 to a[1] do 
                if a[1] mod i = 0 then
                    dem := dem + 1;
            if dem = 2 then 
                s:=s+a[1];
            a[1]:=a[2];
        end 
        
    
    for i:=1 to a[x] do 
        if a[x] mod i = 0 then
            dem := dem + 1;
    if dem = 2 then 
        s:=s+a[x];
        
    readln;
end.