QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #241462 | #5. 在线 O(1) 逆元 | mfeitveer | 80 | 5461ms | 394516kb | C++14 | 372b | 2023-11-06 08:03:27 | 2024-11-05 21:54:32 |
Judging History
answer
#include "inv.h"
const int N = 50000010;
const int mod = 998244353;
typedef long long ll;
ll Inv[N];
ll ask(ll x) {
return (x <= 50000000 ? Inv[x] : (mod - mod / x) * ask(mod % x) % mod);
}
void init(int p) {
Inv[1] = 1;
for(int i = 2;i <= 50000000;i++)
Inv[i] = (mod - mod / i) * Inv[mod % i] % mod;
}
int inv(int x) {
return ask(x);
}
Details
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 592ms
memory: 394448kb
Test #2:
score: 20
Accepted
time: 1168ms
memory: 394408kb
Test #3:
score: 30
Accepted
time: 3606ms
memory: 394516kb
Test #4:
score: 20
Accepted
time: 5461ms
memory: 394324kb
Test #5:
score: 0
Time Limit Exceeded