oj.uz

Submission #1089262

# Submission time Handle Problem Language Result Execution time Memory
1089262 2024-09-16T08:25:54 Z StefanSebez Dancing Elephants (IOI11_elephants) C++14
97 / 100
 9000 ms 15276 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=400;
int n,a[N+50],b[N+50],L,res,nq,dp[600][2500],poslednji[600][2500];
int A[600][2500],sajz[600];
void Calcblok(int i){
	if(sajz[i]==0) return;
	for(int j=sajz[i]-1,k=sajz[i]-1;j>=0;j--){
		while(k>=1 && A[i][j]+L<A[i][k-1]) k--;
		if(A[i][j]+L>=A[i][sajz[i]-1]){
			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){
	int l=0,r=(n-1)/koren,i=(n-1)/koren;
	while(l<=r){
		int mid=l+r>>1;
		if(x<=A[mid][sajz[mid]-1]){i=mid;r=mid-1;}
		else l=mid+1;
	}
	int ind=sajz[i];
	for(int j=0;j<sajz[i];j++) if(A[i][j]==x) ind=j;
	while(ind+1<sajz[i]){swap(A[i][ind],A[i][ind+1]);ind++;}
	sajz[i]--;
	Calcblok(i);
}
void Insert(int x){
	for(int i=0;i<=(n-1)/koren;i++){
		if(sajz[i]==0) 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+5;j++) if(!A[j].empty()){r=A[j][0];break;}*/
		if(A[i][0]<=x && x<=A[i][sajz[i]-1] || (x<=A[i][0]) || (i==(n-1)/koren)){
			sajz[i]++;
			A[i][sajz[i]-1]=x;
			int ind=sajz[i]-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(){
	int ct=-1;
	for(int i=0;i<=(n-1)/koren;i++){
		for(int j=0;j<sajz[i];j++) b[++ct]=A[i][j];
	}
	for(int i=0;i<n;i++){
		A[i/koren][i%koren]=b[i];
		sajz[i/koren]=i%koren+1;
	}
	for(int i=0;i<=(n-1)/koren;i++) Calcblok(i);
}
int Resi(){
	int res=0,x=-1;
	for(int i=0;i<=(n-1)/koren;i++){
		if(sajz[i]==0) continue;
		if(x<=A[i][sajz[i]-1]){
			int ind=0;
			for(int j=sajz[i]-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[i]=a[i];
	sort(b,b+n);
	for(int i=0;i<n;i++){
		A[i/koren][i%koren]=b[i];
		sajz[i/koren]=i%koren+1;
	}
	L=L1;
	//for(int i=0;i<koren+50;i++) A[i].reserve(3*koren+10);
	Calc();
	//for(int i=0;i<=(n-1)/koren;i++) printf("%i ",sajz[i]);
}
int update(int qind, int y){
	Erase(a[qind]);
	a[qind]=y;
	Insert(a[qind]);
	nq++;
	if(nq==koren-5) {Calc();nq=0;}
	return Resi();
}

Compilation message

elephants.cpp: In function 'void Erase(int)':
elephants.cpp:30:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |   int mid=l+r>>1;
      |           ~^~
elephants.cpp: In function 'void Insert(int)':
elephants.cpp:46:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   46 |   if(A[i][0]<=x && x<=A[i][sajz[i]-1] || (x<=A[i][0]) || (i==(n-1)/koren)){
      |      ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 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

Subtask #2
16.0 / 16.0

# 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 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #3
24.0 / 24.0

# 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 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 645 ms 2744 KB Output is correct
8 Correct 812 ms 3156 KB Output is correct
9 Correct 1988 ms 5220 KB Output is correct
10 Correct 1936 ms 4884 KB Output is correct
11 Correct 1532 ms 5020 KB Output is correct
12 Correct 2211 ms 4948 KB Output is correct
13 Correct 2057 ms 4696 KB Output is correct

Subtask #4
47.0 / 47.0

# 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 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 645 ms 2744 KB Output is correct
8 Correct 812 ms 3156 KB Output is correct
9 Correct 1988 ms 5220 KB Output is correct
10 Correct 1936 ms 4884 KB Output is correct
11 Correct 1532 ms 5020 KB Output is correct
12 Correct 2211 ms 4948 KB Output is correct
13 Correct 2057 ms 4696 KB Output is correct
14 Correct 657 ms 4024 KB Output is correct
15 Correct 1422 ms 3768 KB Output is correct
16 Correct 3165 ms 5792 KB Output is correct
17 Correct 4246 ms 7336 KB Output is correct
18 Correct 4166 ms 7248 KB Output is correct
19 Correct 3874 ms 7212 KB Output is correct
20 Correct 4283 ms 7080 KB Output is correct
21 Correct 4160 ms 7076 KB Output is correct
22 Correct 3850 ms 6480 KB Output is correct

Subtask #5
0 / 3.0

# 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 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 645 ms 2744 KB Output is correct
8 Correct 812 ms 3156 KB Output is correct
9 Correct 1988 ms 5220 KB Output is correct
10 Correct 1936 ms 4884 KB Output is correct
11 Correct 1532 ms 5020 KB Output is correct
12 Correct 2211 ms 4948 KB Output is correct
13 Correct 2057 ms 4696 KB Output is correct
14 Correct 657 ms 4024 KB Output is correct
15 Correct 1422 ms 3768 KB Output is correct
16 Correct 3165 ms 5792 KB Output is correct
17 Correct 4246 ms 7336 KB Output is correct
18 Correct 4166 ms 7248 KB Output is correct
19 Correct 3874 ms 7212 KB Output is correct
20 Correct 4283 ms 7080 KB Output is correct
21 Correct 4160 ms 7076 KB Output is correct
22 Correct 3850 ms 6480 KB Output is correct
23 Execution timed out 9025 ms 15276 KB Time limit exceeded
24 Halted 0 ms 0 KB -