QOJ.ac

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
#714072#5. 在线 O(1) 逆元lgx5770 ✓655ms42972kbC++14286b2024-11-05 21:33:352024-11-05 21:33:40

Judging History

This is a historical verdict posted at 2024-11-05 21:33:40.

  • [2024-11-05 22:08:19]
  • 管理员手动重测本题所有提交记录
  • Verdict: 100
  • Time: 5936ms
  • Memory: 42972kb
  • [2024-11-05 21:33:40]
  • Judged
  • Verdict: 70
  • Time: 655ms
  • Memory: 42972kb
  • [2024-11-05 21:33:35]
  • Submitted

answer

#include<bits/stdc++.h>
using namespace std;
const int mod=998244353;
const int N=10000000;
int I[N];
void init(int p){
	I[1]=1;
	for (int i=2;i<N;i++) I[i]=mod-1ll*(mod/i)*I[mod%i]%mod;
}
int inv(int x){
	if (x<N) return I[x];
	else return mod-1ll*(mod/x)*inv(mod%x)%mod;
}

详细


Pretests


Final Tests

Test #1:

score: 30
Accepted
time: 58ms
memory: 42972kb

Test #2:

score: 40
Accepted
time: 655ms
memory: 42848kb

Test #3:

score: 0
Time Limit Exceeded