`freopen`？
还有就是`f[i] = (sum[i-1] - sum[x-1])%100003;`最好改成`f[i] = (sum[i-1] - sum[x-1]+100003)%100003;`，因为负数取模会出奇怪的问题。
by Sweetlemon @ 2018-11-05 20:40:49
惊讶，俊哥儿出现了@[Sweetlemon](/space/show?uid=25008)
by 正式AFO @ 2018-11-05 20:42:46
不应该会有负数吧@[Sweetlemon](/space/show?uid=25008)
by 正式AFO @ 2018-11-05 20:43:12
@[5743377_2002](/space/show?uid=36701) 模了就有可能减成负数。
比如，$10-5\equiv 1\pmod{2}$。但是$10\equiv 0\pmod{2},5\equiv 1\pmod{2},0-1=-1<0$。
by Sweetlemon @ 2018-11-05 20:47:48