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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#406673 | #8543. Periodic Sequence | xiaolang | RE | 0ms | 0kb | C++14 | 1.5kb | 2024-05-07 16:23:02 | 2024-05-07 16:23:03 |
answer
#include<bits/stdc++.h>
using namespace std;
const int N=3e6+5;
int n,MOD;
int cc[N];
int anss[N];
int tar[N];
int inv[N];
int cnt=0;
namespace Polynomial{
vector<int> div(vector<int> c){/* /(2x-1) */
vector<int>ans;
ans.clear();
int len=c.size();
for(int i=0;i<len;i++){
int t=(MOD-c[i])%MOD;
ans.push_back(t);
if(i!=len-1)c[i+1]=((long long)c[i+1]-2*t+MOD+MOD)%MOD;
}
return ans;
}
void div2(vector<int> c,int p){/* /(-x^p+2x-1) */
int len=c.size();
for(int i=0;i<len;i++){
int t=(MOD-c[i])%MOD;
anss[i]=(anss[i]+t)%MOD;
if(i!=len-1)c[i+1]=((long long)c[i+1]-2*t+MOD+MOD)%MOD;
if(i+p<len)c[i+p]=(c[i+p]+t)%MOD;
}
}
};
using namespace Polynomial;
vector<int> fz;
int maxdep=0;
int addlen=0;
int main(){
freopen("1.txt","r",stdin);
freopen("1.out","w",stdout);
//int tim1=clock();
scanf("%d%d",&n,&MOD);
int B=pow(n,0.5);
fz.resize(n+2);
for(int i=1;i<=B;i++){
for(int j=0;j<=n;j++)fz[j]=((j==i)?(MOD-1):0);
div2(fz,i+1);
}
int tim3=clock();
vector<int>ans(n+500,0);
for(int i=n/B+1;i>=1;i--){
for(int j=B+1;j*i-1<=n;j++){
ans[j*i+i-1]=(ans[j*i+i-1]-1+MOD)%MOD;
}
ans=div(ans);
}
//int tim4=clock();
//cout<<tim4-tim3<<"\n";
//int tim4=clock();
//cout<<tim3-tim1<<"\n";
int tot=0;
for(int i=1;i<=n;i++){
//cout<<ans[i]<<" "<<anss[i]<<"\n";
cout<<(ans[i]+anss[i])%MOD<<" ";
}
cout<<"\n";
//int tim2=clock();
//cout<<tim2-tim1<<"\n";
return 0;
}
Details
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Test #1:
score: 0
Dangerous Syscalls
input:
5 1000000007