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The 2nd Universal Cup Finals is coming! Check out our event page, schedule, and competition rules!
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| #209294 | #5. 在线 O(1) 逆元 | fstqwq | 0 | 0ms | 0kb | C++14 | 296b | 2023-10-10 13:46:01 | 2024-11-05 21:53:05 |
Judging History
answer
const int mod = 998244353;
const int pre = mod / 500;
int a[pre];
void init(int p) {
a[0] = a[1] = 1;
for (int i = 2; i < pre; i++) {
a[i] = 1ll * (i - i / mod) * a[i % mod] % mod;
}
}
int inv(int x) { return x < pre ? a[x] : int(1ll * (x - x / mod) * inv(x % mod) % mod); }
詳細信息
Pretests
Final Tests
Test #1:
score: 0
Memory Limit Exceeded
Test #2:
score: 0
Memory Limit Exceeded
Test #3:
score: 0
Memory Limit Exceeded
Test #4:
score: 0
Memory Limit Exceeded
Test #5:
score: 0
Memory Limit Exceeded