oj.uz

Submission #1089076

# Submission time Handle Problem Language Result Execution time Memory
1089076 2024-09-15T22:11:35 Z StefanSebez Dancing Elephants (IOI11_elephants) C++14
97 / 100
 2764 ms 23892 KB 
#include "elephants.h"
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
const int N=150050,inf=1e9;
int koren=350;
int n,a[N],L,res,nq,dp[600][2500],poslednji[600][2500];
vector<int>A[N];
multiset<int>b;
void Calcblok(int i){
	if(A[i].empty()) return;
	for(int j=A[i].size()-1,k=A[i].size()-1;j>=0;j--){
		while(k>=1 && A[i][j]+L<A[i][k-1]) k--;
		if(A[i][j]+L>=A[i].back()){
			dp[i][j]=1;
			poslednji[i][j]=j;
		}
		else{
			dp[i][j]=1+dp[i][k];
			poslednji[i][j]=poslednji[i][k];
		}
	}
}
void Erase(int x){
	for(int i=0;i<koren;i++){
		if(A[i].empty()) continue;
		if(A[i][0]<=x && x<=A[i].back()){
			int ind=A[i].size();
			for(int j=0;j<A[i].size();j++) if(A[i][j]==x) ind=j;
			while(ind+1<A[i].size()){swap(A[i][ind],A[i][ind+1]);ind++;}
			A[i].pop_back();
			Calcblok(i);
			break;
		}
	}
}
void Insert(int x){
	for(int i=0;i<koren;i++){
		if(A[i].empty()) continue;
		int l=0,r=inf;
		for(int j=i-1;j>=0;j--) if(!A[j].empty()){l=A[j].back();break;}
		for(int j=i+1;j<=i+3;j++) if(!A[j].empty()){r=A[j][0];break;}
		if(l<=x && x<=r){
			A[i].pb(x);
			int ind=A[i].size()-1;
			while(ind>=1 && A[i][ind]<A[i][ind-1]){swap(A[i][ind],A[i][ind-1]);ind--;}
			Calcblok(i);
			break;
		}
	}
}
void Calc(){
	for(int i=0;i<koren;i++) A[i].clear();
	int I=0;
	for(auto i=b.begin();i!=b.end();i++,I++) A[I/koren].pb(*i);
	for(int i=0;i<koren;i++) Calcblok(i);
}
int Resi(){
	int res=0;
	int x=A[0][0];
	for(int i=0;i<koren;i++){
		if(A[i].empty()) continue;
		if(x<=A[i].back()){
			int ind=0;
			for(int j=A[i].size()-1;j>=0;j--) if(A[i][j]>=x) ind=j;
			res+=dp[i][ind];
			x=A[i][poslednji[i][ind]]+L+1;
		}
	}
	return res;
}
void init(int N1, int L1, int X[]){
	n = N1;
	for(int i=0;i<n;i++) a[i]=X[i];
	for(int i=0;i<n;i++) b.insert(a[i]);
	L=L1;
	for(int i=0;i<koren+50;i++) A[i].reserve(2*koren+10);
	Calc();
}
int update(int qind, int y){
	Erase(a[qind]);
	b.erase(b.find(a[qind]));
	a[qind]=y;
	b.insert(a[qind]);
	Insert(a[qind]);
	nq++;
	if(nq>=2*koren) {Calc();nq-=2*koren;}
	return Resi();
}

Compilation message

elephants.cpp: In function 'void Erase(int)':
elephants.cpp:33:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |    for(int j=0;j<A[i].size();j++) if(A[i][j]==x) ind=j;
      |                ~^~~~~~~~~~~~
elephants.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |    while(ind+1<A[i].size()){swap(A[i][ind],A[i][ind+1]);ind++;}
      |          ~~~~~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4992 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4992 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 407 ms 7520 KB Output is correct
8 Correct 516 ms 8024 KB Output is correct
9 Correct 1287 ms 11512 KB Output is correct
10 Correct 1252 ms 11300 KB Output is correct
11 Correct 869 ms 11248 KB Output is correct
12 Correct 1458 ms 11408 KB Output is correct
13 Correct 1255 ms 11100 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4992 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 407 ms 7520 KB Output is correct
8 Correct 516 ms 8024 KB Output is correct
9 Correct 1287 ms 11512 KB Output is correct
10 Correct 1252 ms 11300 KB Output is correct
11 Correct 869 ms 11248 KB Output is correct
12 Correct 1458 ms 11408 KB Output is correct
13 Correct 1255 ms 11100 KB Output is correct
14 Correct 483 ms 9040 KB Output is correct
15 Correct 868 ms 9320 KB Output is correct
16 Correct 2067 ms 11852 KB Output is correct
17 Correct 2741 ms 13960 KB Output is correct
18 Correct 2764 ms 13892 KB Output is correct
19 Correct 2376 ms 14072 KB Output is correct
20 Correct 2754 ms 13908 KB Output is correct
21 Correct 2760 ms 14160 KB Output is correct
22 Correct 2585 ms 13396 KB Output is correct

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4992 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 407 ms 7520 KB Output is correct
8 Correct 516 ms 8024 KB Output is correct
9 Correct 1287 ms 11512 KB Output is correct
10 Correct 1252 ms 11300 KB Output is correct
11 Correct 869 ms 11248 KB Output is correct
12 Correct 1458 ms 11408 KB Output is correct
13 Correct 1255 ms 11100 KB Output is correct
14 Correct 483 ms 9040 KB Output is correct
15 Correct 868 ms 9320 KB Output is correct
16 Correct 2067 ms 11852 KB Output is correct
17 Correct 2741 ms 13960 KB Output is correct
18 Correct 2764 ms 13892 KB Output is correct
19 Correct 2376 ms 14072 KB Output is correct
20 Correct 2754 ms 13908 KB Output is correct
21 Correct 2760 ms 14160 KB Output is correct
22 Correct 2585 ms 13396 KB Output is correct
23 Incorrect 68 ms 23892 KB Output isn't correct
24 Halted 0 ms 0 KB -