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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #209309 | #5. 在线 O(1) 逆元 | fstqwq | 60 | 3890ms | 7816kb | C++14 | 369b | 2023-10-10 13:51:59 | 2024-11-05 21:53:14 |
Judging History
answer
const int mod = 998244353;
const int pre = 1e6;
int a[pre];
void init(int p) {
a[0] = a[1] = 1;
for (int i = 2; i < pre; i++) {
a[i] = 1ll * (mod - mod / i) * a[mod % i] % mod;
}
}
int inv(int x) {
int ret = 1;
while (x >= pre) {
ret = 1ll * ret * (mod - mod / x) % mod;
x = mod % x;
}
ret = 1ll * ret * a[x] % mod;
return ret;
}
詳細信息
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 9ms
memory: 7692kb
Test #2:
score: 20
Accepted
time: 755ms
memory: 7692kb
Test #3:
score: 30
Accepted
time: 3890ms
memory: 7816kb
Test #4:
score: 0
Time Limit Exceeded
Test #5:
score: 0
Time Limit Exceeded