oj.uz

Submission #933034

# Submission time Handle Problem Language Result Execution time Memory
933034 2024-02-24T22:28:04 Z Edu175 Sequence (APIO23_sequence) C++17
53 / 100
 2000 ms 65952 KB 
#include "sequence.h"
#include <bits/stdc++.h>
#define pb push_back
#define fst first
#define snd second
#define fore(i,a,b) for(ll i=a,apio=b;i<apio;i++)
#define SZ(x) ((int)x.size())
#define ALL(x) x.begin(),x.end()
#define mset(a,v) memset((a),(v),sizeof(a))
#define imp(v) for(auto slkdh:v)cout<<slkdh<<" ";cout<<"\n"
using namespace std;
typedef int ll;
typedef pair<ll,ll> ii;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
const ll INF=5e6;
struct node{
	ll mxp,mnp,mxs,mns,sum;
};
node oper(node a, node b){
	a.mxp=max(a.mxp,a.sum+b.mxp);
	a.mnp=min(a.mnp,a.sum+b.mnp);
	a.mxs=max(a.mxs+b.sum,b.mxs);
	a.mns=min(a.mns+b.sum,b.mns);
	a.sum+=b.sum;
	return a;
}
node NEUT({-INF,INF,-INF,INF,0});
struct STcustom{
	vector<node>t; ll n;
	STcustom(ll n):t(2*n+5,node({0,0,0,0,0})),n(n){}
	void upd(ll p, ll v){
		p+=n;
		t[p].mxp+=v,t[p].mnp+=v,t[p].mxs+=v,t[p].mns+=v,t[p].sum+=v;
		for(;p>1;p>>=1)p^=p&1,t[p>>1]=oper(t[p],t[p^1]);
	}
	node query(ll l, ll r){
		node izq=NEUT,der=NEUT;
		for(l+=n,r+=n;l<r;l>>=1,r>>=1){
			if(l&1)izq=oper(izq,t[l++]);
			if(r&1)der=oper(t[--r],der);
		}
		return oper(izq,der);
	}
};
const ll C=5e5,MAXN=2*C+5;
struct STree{
	vector<ll>t; ll n;
	STree(ll n):t(2*n+5,INF),n(n){}
	void upd(ll p, ll v){
		for(p+=n,t[p]=min(t[p],v);p>1;p>>=1)t[p>>1]=min(t[p],t[p^1]);
	}
	ll query(ll l, ll r){
		ll res=INF;
		for(l+=n,r+=n;l<r;l>>=1,r>>=1){
			if(l&1)res=min(res,t[l++]);
			if(r&1)res=min(res,t[--r]);
		}
		return res;
	}
};
ll l[MAXN],r[MAXN];
bool cmp(ll i, ll j){
	return ii({l[i],i})<ii({l[j],j});
}
const ll B=84;
int sequence(int N, std::vector<int> A) {
	ll n=N;
	vector<ll>a(n);
	fore(i,0,n)a[i]=A[i]-1;
	vector<ll>pos[n];
	fore(i,0,n)pos[a[i]].pb(i);
	STcustom st(n);
	fore(i,0,n)st.upd(i,1);
	ll res=1;
	vector<ll>s(n);
	fore(i,0,n)s[i]=1;
	fore(i,0,n)if(SZ(pos[i])){
		vector<ll>&v=pos[i];
		for(auto j:v)st.upd(j,-1),s[j]--;
		if(SZ(v)<B){
			vector<node> pre(SZ(v)),suf(SZ(v));
			fore(j,0,SZ(v)){
				ll p=v[j];
				pre[j]=st.query(0,p+1);
				suf[j]=st.query(p,n);
			}
			fore(s,0,SZ(v))fore(e,s+1,SZ(v)){
				ll dif=pre[e].sum-pre[s].sum;
				if(dif<=0){
					if(dif+pre[s].mxs+suf[e].mxp+e-s+1>=0)
						res=max(res,e-s+1);
				}
				else {
					if(dif+pre[s].mns+suf[e].mnp-(e-s+1)<=0)
						res=max(res,e-s+1);
				}
			}
		}
		else {
			ll sum=0,rew=0;
			vector<ll>rw(n+1);
			vector<ll>ev{n};
			l[n]=r[n]=rw[n]=0;
			fore(j,0,n){
				sum+=s[j],rew+=a[j]==i;
				rw[j]=rew;
				l[j]=sum-rew,r[j]=sum+rew;
				ev.pb(j);
			}
			sort(ALL(ev),cmp); reverse(ALL(ev));
			STree st(2*n+5+C);
			for(auto i:ev){
				res=max(res,rw[i]-st.query(0,r[i]+C+1));
				st.upd(r[i]+C,rw[i]);
			}
		}
		for(auto j:v)st.upd(j,-1),s[j]--;
	}
	return res;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 2 ms 6236 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 2 ms 6236 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 4 ms 6648 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 3 ms 6488 KB Output is correct
20 Correct 3 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 274 ms 49492 KB Output is correct
3 Correct 285 ms 49492 KB Output is correct
4 Correct 656 ms 65660 KB Output is correct
5 Correct 270 ms 48464 KB Output is correct
6 Correct 270 ms 48720 KB Output is correct
7 Execution timed out 2041 ms 65952 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 386 ms 65364 KB Output is correct
3 Correct 380 ms 65712 KB Output is correct
4 Correct 392 ms 65672 KB Output is correct
5 Correct 379 ms 65700 KB Output is correct
6 Correct 291 ms 65328 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 363 ms 55176 KB Output is correct
2 Correct 366 ms 55212 KB Output is correct
3 Correct 377 ms 54448 KB Output is correct
4 Correct 360 ms 54856 KB Output is correct
5 Correct 323 ms 51280 KB Output is correct
6 Correct 306 ms 51284 KB Output is correct
7 Correct 273 ms 50256 KB Output is correct
8 Correct 259 ms 49804 KB Output is correct

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 2 ms 6236 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 4 ms 6648 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 3 ms 6488 KB Output is correct
20 Correct 3 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 57 ms 8280 KB Output is correct
24 Correct 47 ms 8284 KB Output is correct
25 Correct 45 ms 8292 KB Output is correct
26 Execution timed out 2065 ms 17924 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 2 ms 6236 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 4 ms 6648 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 3 ms 6488 KB Output is correct
20 Correct 3 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 3 ms 6492 KB Output is correct
23 Correct 274 ms 49492 KB Output is correct
24 Correct 285 ms 49492 KB Output is correct
25 Correct 656 ms 65660 KB Output is correct
26 Correct 270 ms 48464 KB Output is correct
27 Correct 270 ms 48720 KB Output is correct
28 Execution timed out 2041 ms 65952 KB Time limit exceeded
29 Halted 0 ms 0 KB -