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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#608477 | #9250. Max GCD | _CLY_ | TL | 91ms | 54968kb | C++14 | 1.6kb | 2024-10-03 22:08:51 | 2024-10-03 22:08:52 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
inline long long read(){
long long x=0; char ch; bool f=0;
while(((ch=getchar())<'0'||ch>'9')&&ch!='-') ;
if(ch=='-') f=1;
else x=ch^48;
while((ch=getchar())>='0'&&ch<='9') x=(x<<1)+(x<<3)+(ch^48);
return f?-x:x;
}
const int N=1e6+5;
int n,a[N],q;
vector<int> v[N];
int p[N];
vector<pair<int,int> > V[N];
struct tree{
int mx;
}t[N<<2];
#define ls (p<<1)
#define rs (p<<1|1)
void up(int p){
t[p].mx=max(t[ls].mx,t[rs].mx);
}
void cg(int p,int w,int l,int r,int d){
if(l==r){
t[p].mx=max(t[p].mx,d); return;
}
int mid=(l+r)/2;
if(w<=mid) cg(ls,w,l,mid,d);
else cg(rs,w,mid+1,r,d);
up(p);
}
int ask(int p,int st,int en,int l,int r){
if(st<=l&&r<=en) return t[p].mx;
int mid=(l+r)/2,v=0;
if(st<=mid) v=ask(ls,st,en,l,mid);
if(mid<en) v=max(v,ask(rs,st,en,mid+1,r));
return v;
}
int ans[N];
int main(){
// freopen("t2.in","r",stdin);
n=read(),q=read();
for(int i=1;i<=n;i++) a[i]=read(),v[a[i]].push_back(i);
for(int d=1;d<=1e6;d++){
int c=0;
for(int i=d;i<=1e6;i+=d){
for(int ps:v[i]) p[++c]=ps;
}
sort(p+1,p+1+c);
for(int i=1;i<c-1;i++){
int x=p[i],y=p[i+1];
int l=i+2,r=c;
while(l<=r){
int mid=(l+r)/2;
if(p[mid]-y>=y-x) r=mid-1;
else l=mid+1;
}
if(l<=c) V[p[l]].push_back({x,d});
}
}
for(int i=1;i<=q;i++){
int l=read(),r=read();
V[r].push_back({l,-i});
}
for(int i=1;i<=n;i++){
for(auto [x,d]:V[i]){
if(d>0) cg(1,x,1,n,d);
else ans[-d]=ask(1,x,i,1,n);
}
}
for(int i=1;i<=n;i++) printf("%d\n",ans[i]);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 91ms
memory: 54968kb
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
Time 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...