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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#633774 | #9250. Max GCD | 11d10xy | RE | 0ms | 0kb | C++14 | 1.2kb | 2024-10-12 16:11:04 | 2024-10-12 16:11:10 |
answer
#include<bits/stdc++.h>
using namespace std;
constexpr int V=1000010;
int n,m,a[150010],ans[100010];
vector<int>divisor[1000010],pos[1000010];
struct Q_{int l,i;};
vector<Q_>q[150010];
vector<pair<int,int>>pr[150010];
namespace ds{
int mx[150010];
inline void ins(int p,int v){
for(p=n-p+1;p<=n;p+=p&-p)mx[p]=max(mx[p],v);
}
inline int ask(int p){
int res=0;
for(p=n-p+1;p;p-=p&-p)res=max(res,mx[p]);
return res;
}
}
int main(){
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++)scanf("%d",&a[i]);
for(int i=1,l,r;i<=m;i++){
scanf("%d%d",&l,&r);
q[r].push_back({l,i});
}
for(int i=1;i<=V;i++)for(int j=i;j<=V;j+=i)divisor[j].push_back(i);
for(int i=1;i<=n;i++)for(int d:divisor[a[i]])pos[d].push_back(i);
for(int i=1;i<=V;i++){
for(int j=1;j<pos[i].size();j++){
auto it=lower_bound(begin(pos[i]),end(pos[i]),pos[i][j]+pos[i][j]-pos[i][j-1]);
if(it!=end(pos[i]))pr[*it].emplace_back(pos[i][j-1],i);
}
}
for(int i=1;i<=n;i++){
for(auto X:pr[i])ds::ins(X.first,X.second);
for(Q_ x:q[i])ans[x.i]=ds::ask(x.l);
}
for(int i=1;i<=m;i++)printf("%d\n",ans[i]);
return 0;
}
Details
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Test #1:
score: 0
Runtime Error
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