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QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #293459 | #5. 在线 O(1) 逆元 | iee | 80 | 5113ms | 394504kb | C++14 | 312b | 2023-12-29 10:31:08 | 2024-11-05 21:56:58 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
constexpr int P = 998244353, N = 1e8;
int v[N];
void init(int p) {
v[1] = 1;
for (register int i = 2; i < N; i++) {
v[i] = P - 1ll * v[P % i] * (P / i) % P;
}
}
int inv(int x) {
if (x < N) return v[x];
return P - 1ll * inv(P % x) * (P / x) % P;
}
Details
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 727ms
memory: 394452kb
Test #2:
score: 20
Accepted
time: 1484ms
memory: 394364kb
Test #3:
score: 30
Accepted
time: 3517ms
memory: 394384kb
Test #4:
score: 20
Accepted
time: 5113ms
memory: 394504kb
Test #5:
score: 0
Time Limit Exceeded