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- program ivanov_kolya;
- var
- n : integer;
- a : array[1..10000] of integer;
- procedure readData();
- begin
- inc(n);
- read(a[n]);
- readData();
- end;
- function calc(i, k : integer) : integer;
- begin
- if k = 0 then calc := 0 else calc := a[i] + calc(i - 1, k - 1);
- end;
- procedure doEverything();
- begin
- n := 0;
- readData();
- if calc(n div 2, n div 2) = calc(n, n div 2) then write('Yes') else write('No');
- end;
- begin
- doEverything();
- end.
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