QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#725458 | #9543. Good Partitions | KiritoXD | ML | 3ms | 6536kb | C++20 | 1.7kb | 2024-11-08 17:56:46 | 2024-11-08 17:56:46 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define ls now<<1
#define rs now<<1|1
#define endl "\n"
#define lowbit(x) ((x)&(-x))
typedef long long ll;
const int N=2e5+7, mod=1e9+7;
int tr[N<<2];
int n,q,a[N],x,v,cf[N],phi[N];
void init(int n){
for(int i=1;i<=n;i++){
for(int j=1;j*i<=n;j++){
phi[j*i]++;
}
}
}
void update(int now){
tr[now]=__gcd(tr[ls],tr[rs]);
}
void build(int now,int l,int r){
if(l==r){
if(cf[l]<0){
tr[now]=l;
}
else tr[now]=0;
return;
}
int mid=(l+r)>>1;
build(ls,l,mid);
build(rs,mid+1,r);
update(now);
}
void modify(int now,int l,int r,int val,int pos){
if(l==r){
if(val>=0){
tr[now]=0;
}
else tr[now]=l;
return;
}
int mid=(l+r)>>1;
if(pos<=mid){
modify(ls,l,mid,val,pos);
}
else modify(rs,mid+1,r,val,pos);
update(now);
}
void solve(){
cin>>n>>q;
for(int i=1;i<=n;i++)cin>>a[i];
for(int i=1;i<n;i++)cf[i]=a[i+1]-a[i];
build(1,1,n-1);
int ans=abs(tr[1]);
if(n==1||ans==0)cout<<n<<endl;
else cout<<phi[ans]<<endl;
while(q--){
cin>>x>>v;
a[x]=v;
if(x>1)modify(1,1,n-1,a[x]-a[x-1],x-1);
if(x<n)modify(1,1,n-1,a[x+1]-a[x],x);
if(n==1){
cout<<n<<endl;
continue;
}
ans=abs(tr[1]);
if(!ans){
cout<<n<<endl;
}
else cout<<phi[ans]<<endl;
}
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
init(N);
int t=1;
cin>>t;
while(t--)solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 3ms
memory: 6536kb
input:
1 5 2 4 3 2 6 1 2 5 3 5
output:
1 2 3
result:
ok 3 lines
Test #2:
score: -100
Memory Limit Exceeded
input:
1 1 1 2000000000 1 1999999999