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题目解答

题目:
const c = 2009;
var n, p, s, i, j, t: integer;
begin
read(n, p); s := 0; t := 1;
for i := 1 to n do begin
t := t * p mod c;
for j := 1 to i do s := (s + t) mod c;
end;
writeln(s);
end.
输入:11 2
输出:782
考点:
分析:
解答:
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