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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#682595#9250. Max GCDlouhao088ML 530ms175660kbC++981.8kb2024-10-27 16:14:372024-10-27 16:14:38

Judging History

你现在查看的是最新测评结果

  • [2024-10-27 16:14:38]
  • 评测
  • 测评结果:ML
  • 用时:530ms
  • 内存:175660kb
  • [2024-10-27 16:14:37]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;

typedef pair<int,int> pr;

const int MAXN=1.5e5,MAXQ=1e5,MAXA=1e6,S=387;

int n,q,ans[MAXQ+5];
vector<int> fac[MAXA+5],loc[MAXA+5];
vector<pr> buc[MAXN+5],Q[MAXA+5],ope[MAXN+5];
vector<pr> qry[MAXN+5];

inline void Init()
{
    for(int i=1;i<=MAXA;i++)
        for(int j=i;j<=MAXA;j+=i)
            fac[j].push_back(i);
}

int maxn[MAXN+5],Maxn[S+5],Bloc[MAXN+5];
inline void Modify(int x,int v) {maxn[x]=max(maxn[x],v),Maxn[Bloc[x]]=max(Maxn[Bloc[x]],v);}
inline int GetMax(int L,int R)
{
	int res=0;
	for(int i=Bloc[L];i<Bloc[R];i++) res=max(res,Maxn[i]);
	for(int i=(Bloc[R]-1)*S+1;i<=R;i++) res=max(res,maxn[i]);
	return res;
}

int main()
{
    Init();
    scanf("%d %d",&n,&q);
    for(int i=1,A;i<=n;i++)
	{
		scanf("%d",&A);
		for(int j=0;j<fac[A].size();j++) loc[fac[A][j]].push_back(i);
	}
	for(int i=1;i<=MAXA;i++)
		for(int j=0;j+1<loc[i].size();j++)
			if(2*loc[i][j+1]-loc[i][j]<=n) buc[2*loc[i][j+1]-loc[i][j]].push_back(make_pair(loc[i][j],i));
	for(int i=1;i<=n;i++)
		for(int j=0;j<buc[i].size();j++)
			Q[buc[i][j].second].push_back(make_pair(buc[i][j].first,i));
	for(int i=1;i<=MAXA;i++)
		for(int j=0,k=0;j<Q[i].size();j++)
		{
			while(k<loc[i].size() && loc[i][k]<Q[i][j].second) ++k;
			if(k<loc[i].size()) ope[Q[i][j].first].push_back(make_pair(loc[i][k],i));
		}
	for(int i=1,L,R;i<=q;i++) scanf("%d %d",&L,&R),qry[L].push_back(make_pair(R,i));
	for(int i=1,L=1,R;L<=n;i++,L=R+1)
	{
		R=min(L+S-1,n);
		for(int j=L;j<=R;j++) Bloc[j]=i;
	}
	for(int i=n;i;i--)
	{
		for(int j=0;j<ope[i].size();j++) Modify(ope[i][j].first,ope[i][j].second);
		for(int j=0;j<qry[i].size();j++) ans[qry[i][j].second]=GetMax(i,qry[i][j].first);
	}
	for(int i=1;i<=q;i++) printf("%d\n",ans[i]);
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 530ms
memory: 175660kb

input:

8 8
8 24 4 6 6 7 3 3
1 5
2 6
3 7
5 8
4 8
1 3
2 5
3 8

output:

4
2
3
1
3
4
2
3

result:

ok 8 tokens

Test #2:

score: -100
Memory Limit Exceeded

input:

150000 100000
982800 554400 665280 982800 997920 720720 786240 831600 997920 982800 786240 982800 942480 831600 887040 665280 831600 960960 786240 982800 786240 942480 665280 831600 942480 665280 982800 960960 960960 997920 720720 960960 960960 665280 982800 665280 982800 942480 786240 997920 554400...

output:

997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920
997920...

result: