QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#745769#9543. Good PartitionsP3KOWA 207ms12992kbC++171.6kb2024-11-14 11:28:222024-11-14 11:28:31

Judging History

你现在查看的是最新测评结果

  • [2024-11-14 11:28:31]
  • 评测
  • 测评结果:WA
  • 用时:207ms
  • 内存:12992kb
  • [2024-11-14 11:28:22]
  • 提交

answer

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

const int MAXN=2e5+5;

typedef long long ll;

ll n,q,a[MAXN],d[MAXN];

ll gcd(ll x,ll y){
	return y==0?x:gcd(y,x%y);
}

struct seg{
	ll g;
}tr[MAXN*4];

void pushup(int p){
	tr[p].g=gcd(tr[p<<1].g,tr[p<<1|1].g);
}

void build(int p,int l,int r){
	if(l==r){
		tr[p]={d[l]};
		return;
	}
	int mid=l+r>>1;
	build(p<<1,l,mid);
	build(p<<1|1,mid+1,r);
	pushup(p);
}

void insert(int p,int l,int r,int tag,ll v){
	if(l==r){
		tr[p].g=v;
		return;
	}
	int mid=l+r>>1;
	if(tag<=mid)insert(p<<1,l,mid,tag,v);
	else insert(p<<1|1,mid+1,r,tag,v);
	pushup(p);
}

int query(int p,int s,int t,int l,int r){
	if(s>=l&&t<=r)return tr[p].g;
	int mid=s+t>>1;
	ll ans=0;
	if(l<=mid)ans=gcd(query(p<<1,s,mid,l,r),ans);
	if(r>mid)ans=gcd(query(p<<1|1,mid+1,t,l,r),ans);
	return ans;
}

void input(){
	cin>>n>>q;
	for(int i=1;i<=n;i++)cin>>a[i];
}

int numfac(ll x){
	if(x==0)return n;
	int ans=1;
	for(int i=2;x>1;i++){
		int cnt=0;
		if(x%i==0)
			while(x%i==0)x/=i,cnt++;
		ans*=(cnt+1);
	}
	return ans;
}

void solve(){
	input();
	if(n==1){
		for(int i=0;i<=q;i++)
			cout<<1<<"\n";
		return;
	}
	for(int i=1;i<n;i++){
		if(a[i+1]<a[i])d[i]=i;
		else d[i]=0;
	}
	n--;
	build(1,1,n);
	cout<<numfac(query(1,1,n,1,n))<<"\n";
	for(int i=1;i<=q;i++){
		int p,v;cin>>p>>v;
		a[p]=v;
		if(p>1){
			if(a[p]>=a[p-1])insert(1,1,n,p-1,0);
			else insert(1,1,n,p-1,p-1);
		}
		if(p<=n){
			if(a[p]<=a[p+1])insert(1,1,n,p,0);
			else insert(1,1,n,p,p);
		}
		cout<<numfac(query(1,1,n,1,n))<<"\n";
	}
}

int main(){
	int t;cin>>t;
	while(t--){
		solve();	
	}
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 5664kb

input:

1
5 2
4 3 2 6 1
2 5
3 5

output:

1
2
3

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 1ms
memory: 5744kb

input:

1
1 1
2000000000
1 1999999999

output:

1
1

result:

ok 2 lines

Test #3:

score: -100
Wrong Answer
time: 207ms
memory: 12992kb

input:

1
200000 200000
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 ...

output:

160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160
199999
160...

result:

wrong answer 2nd lines differ - expected: '200000', found: '199999'