oj.uz

Submission #970369

# Submission time Handle Problem Language Result Execution time Memory
970369 2024-04-26T12:32:40 Z emptypringlescan Park (JOI17_park) C++17
20 / 100
 148 ms 668 KB 
#include <bits/stdc++.h>
using namespace std;
#include "park.h"
int n;
unordered_set<long long> done;
int cur;
void dnc(int a, int b, int h){
	if(a>b) swap(a,b);
	if(done.find(a*2000+b)!=done.end()) return;
	done.insert(a*2000+b);
	if(b<cur) return;
	assert(a!=b);
	assert(a>=0&&b>=0);
	int lo=0,hi=h,mid;
	while(lo<hi){
		mid=(lo+hi)/2;
		int place[n];
		for(int i=0; i<mid; i++) place[i]=1;
		for(int i=mid; i<n; i++) place[i]=0;
		place[a]=1; place[b]=1;
		int x=Ask(a,b,place);
		if(x) hi=mid;
		else lo=mid+1;
	}
	if(lo==0) Answer(a,b);
	else{
		dnc(a,lo-1,lo);
		dnc(lo-1,b,lo);
	}
}
void Detect(int t, int N){
	n=N;
	if(t==1){
		int place[n];
		for(int i=0; i<n; i++) place[i]=0;
		for(int i=0; i<n; i++){
			for(int j=i+1; j<n; j++){
				place[i]=1;
				place[j]=1;
				int x=Ask(i,j,place);
				if(x) Answer(i,j);
				place[i]=0;
				place[j]=0;
			}
		}
	}
	else if(t==2){
		dnc(0,n-1,n);
	}
	else{
		for(int i=1; i<n; i++) cur=i,dnc(0,i,n);
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 3 ms 348 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 3 ms 456 KB Output is correct
5 Correct 4 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 668 KB Output is correct
2 Correct 66 ms 604 KB Output is correct
3 Correct 49 ms 600 KB Output is correct
4 Correct 22 ms 600 KB Output is correct
5 Correct 22 ms 604 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 596 KB Output is correct
2 Correct 97 ms 592 KB Output is correct
3 Incorrect 100 ms 600 KB Wrong Answer[5]
4 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 79 ms 556 KB Wrong Answer[5]
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 148 ms 648 KB Wrong Answer[5]
2 Halted 0 ms 0 KB -