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답안 #1104926

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1104926 2024-10-24T18:03:48 Z alexander707070 고대 책들 (IOI17_books) C++14
0 / 100
 2 ms 4608 KB 
#include<bits/stdc++.h>
#define MAXN 1000007
using namespace std;

int n,s,p[MAXN],fr,last,mins,maxs,pref[MAXN],curr;
bool li[MAXN];
long long ans;

void dfs(int x){
	li[x]=true;

	ans+=abs(x-p[x]);
	mins=min(mins,x);
	maxs=max(maxs,x);

	if(!li[p[x]])dfs(p[x]);
}

long long minimum_walk(vector<int> P, int S){
	n=int(P.size()); s=S+1;

	for(int i=1;i<=n;i++){
		p[i]=P[i-1]+1;
	}

	for(int i=1;i<=n;i++){
		if(!li[i]){
			if(p[i]!=i)last=i;

			mins=n; maxs=1;
			dfs(i);

			pref[mins]++; pref[maxs]--;
		}
	}

	for(int i=1;i<=n;i++)li[i]=false;

	for(int i=n;i>=1;i--){
		if(!li[i]){
			if(p[i]!=i)fr=i;

			dfs(i);
		}
	}
	ans/=2;

	for(int i=1;i<=n-1;i++){
		curr+=pref[i];
		if(i<s)continue;

		if(curr==0 and last>i)ans+=2;
	}

	curr=0;
	for(int i=n;i>=1;i--){
		curr+=pref[i];
		if(i>s)continue;
		if(curr==0 and fr<i)ans+=2;
	}

	return ans;
}

/*int main(){

	cout<<minimum_walk({0, 2, 3, 1}, 0)<<"\n";

	return 0;
}*/

Subtask #1
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4608 KB Output is correct
4 Correct 1 ms 4432 KB Output is correct
5 Correct 1 ms 4432 KB Output is correct
6 Correct 1 ms 4432 KB Output is correct
7 Correct 1 ms 4432 KB Output is correct
8 Correct 2 ms 4432 KB Output is correct
9 Incorrect 1 ms 4432 KB 3rd lines differ - on the 1st token, expected: '0', found: '2'
10 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4608 KB Output is correct
4 Correct 1 ms 4432 KB Output is correct
5 Correct 1 ms 4432 KB Output is correct
6 Correct 1 ms 4432 KB Output is correct
7 Correct 1 ms 4432 KB Output is correct
8 Correct 2 ms 4432 KB Output is correct
9 Incorrect 1 ms 4432 KB 3rd lines differ - on the 1st token, expected: '0', found: '2'
10 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4608 KB Output is correct
4 Correct 1 ms 4432 KB Output is correct
5 Correct 1 ms 4432 KB Output is correct
6 Correct 1 ms 4432 KB Output is correct
7 Correct 1 ms 4432 KB Output is correct
8 Correct 2 ms 4432 KB Output is correct
9 Incorrect 1 ms 4432 KB 3rd lines differ - on the 1st token, expected: '0', found: '2'
10 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 4432 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4608 KB Output is correct
4 Correct 1 ms 4432 KB Output is correct
5 Correct 1 ms 4432 KB Output is correct
6 Correct 1 ms 4432 KB Output is correct
7 Correct 1 ms 4432 KB Output is correct
8 Correct 2 ms 4432 KB Output is correct
9 Incorrect 1 ms 4432 KB 3rd lines differ - on the 1st token, expected: '0', found: '2'
10 Halted 0 ms 0 KB -