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Submission #618018

# Submission time Handle Problem Language Result Execution time Memory
618018 2022-08-01T19:15:08 Z StrawHatWess Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 212 KB 
#include "books.h"

#include <bits/stdc++.h>
using namespace std; 

typedef long long ll; 
typedef vector<int>vi;
#define pb push_back
#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()

#define FOR(i,a,b) for(int i=a; i<b; i++)

void dbgv(vi vec){for(int x: vec) cout << x << ' '; cout << endl; }

//---------------------------

int N; 
vi a,p; 

int check(){
	FOR(i,0,N) if(a[i]==-1 || p[a[i]]!=i) return 0; 
	return 1;  	
}

ll minimum_walk(vi p, int s) {
	::p=p; 
	N=sz(p); 
	a.resize(N); 
	iota(all(a),0); 

	int on=-1, i=s, ty=1;
	ll ans=0;  
	while(!check()){
		/*cout << i << ' ' << on << endl;
		dbgv(a); */

		if(a[i]!=-1 && p[a[i]]==i){
			i+=ty;
			ans++; 
			continue; 
		}



		swap(a[i],on); 

		if(on!=-1){
			if(i<p[on]) i++, ty=1; 
			else i--, ty=-1;
			ans++;
		}
		else if(!check()) i++; 
		else break; 
	}
	ans+=i; 
	return ans; 
}


/*

4 0
0 2 3 1


*/

/*

3 0
2 0 1

*/

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '5'
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '5'
5 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '5'
5 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB 3rd lines differ - on the 1st token, expected: '3304', found: '91581'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '4', found: '5'
5 Halted 0 ms 0 KB -