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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 |
|---|---|---|---|---|---|---|---|---|---|
| #293450 | #5. 在线 O(1) 逆元 | iee | 100 ✓ | 5347ms | 394516kb | C++17 | 303b | 2023-12-29 10:21:00 | 2024-11-05 21:56:34 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
constexpr int N = 1e8, P = 998244353;
int v[N];
void init(int p) {
v[1] = 1;
for (int i = 2; i < N; i++) {
v[i] = 1ll * v[P % i] * (P - P / i) % P;
}
}
int inv(int x) {
if (x < N) return v[x];
return 1ll * inv(P % x) * (P - P / x) % P;
}
詳細信息
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 649ms
memory: 394308kb
Test #2:
score: 20
Accepted
time: 1126ms
memory: 394516kb
Test #3:
score: 30
Accepted
time: 3042ms
memory: 394508kb
Test #4:
score: 20
Accepted
time: 4402ms
memory: 394324kb
Test #5:
score: 20
Accepted
time: 5347ms
memory: 394400kb