// identical to some cf problem, don't remember name
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3phCa4T ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e
template<class S,S (*op)(S,S),S (*e)()>
struct segtree{
int n;
vec(S) seg;
segtree(int _n){
init(_n);
}
void init(int _n){
n=1;
while(n<=_n){
n*=2;
}
seg=vec(S)(2*n);
n=_n;
}
S prod(int node,int l,int r,int _l,int _r){
if(l>=_r or r<=_l){
return e();
}
if(_l<=l and r<=_r){
return seg[node];
}
int m=(l+r)>>1;
return op(prod(node*2,l,m,_l,_r),prod(node*2+1,m,r,_l,_r));
}
S prod(int l,int r){
return prod(1,0,n,l,r);
}
void set(int node,int l,int r,int pos,const S&x){
if(l==r-1){
seg[node]=x;
return;
}
int m=(l+r)/2;
if(pos<m){
set(node*2,l,m,pos,x);
}else{
set(node*2+1,m,r,pos,x);
}
seg[node]=op(seg[node*2],seg[node*2+1]);
}
void set(int pos,const S&x){
set(1,0,n,pos,x);
}
S get(int pos){
return prod(1,0,n,pos,pos+1);
}
};
int op(int l,int r){return l+r;}
int e(){return 0;}
signed main(){
_3phCa4T;
int n,q;
cin>>n>>q;
vi a(n);
rep(i,n){
cin>>a[i];
}
vec(vec(pii)) qry(n);
rep(i,q){
int l,r;
cin>>l>>r;
l-=1,r-=1;
qry[l].pb(pii(r,i));
}
vi pns(q);
std::map<int,int> _lst,__lst;
segtree<int,op,e> seg(n);
per(i,n){
int v=a[i];
int nj=_lst[v];
int j=__lst[v];
if(nj){
seg.set(nj,1);
}
if(j){
seg.set(j,-1);
}
for(auto p:qry[i]){
pns[p.se]=seg.prod(i,p.fi+1);
}
__lst[v]=nj;
_lst[v]=i;
}
rep(i,q){
print(pns[i]);
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 4 |
Incorrect |
5 ms |
724 KB |
Output isn't correct |
| 5 |
Incorrect |
96 ms |
8660 KB |
Output isn't correct |
| 6 |
Incorrect |
101 ms |
8676 KB |
Output isn't correct |
| 7 |
Incorrect |
232 ms |
17480 KB |
Output isn't correct |
| 8 |
Incorrect |
388 ms |
27344 KB |
Output isn't correct |
| 9 |
Incorrect |
522 ms |
35008 KB |
Output isn't correct |
| 10 |
Incorrect |
662 ms |
42832 KB |
Output isn't correct |
