http://www.jungol.co.kr/bbs/board.php?bo_table=pbank&wr_id=332&sca=99 JUNGOL www.jungol.co.kr #include int fibo[100000], cycle; const int CYCLE = 7; bool CheckCycle(int idx) { for (int i = 0; i < CYCLE; i++) { if (fibo[i] != fibo[idx - CYCLE + i]) return false; } return true; } void SetFivo() { fibo[0] = 0, fibo[1] = fibo[2] = 1; for (int i = 2; i