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Submission #335706

# Submission time Handle Problem Language Result Execution time Memory
335706 2020-12-13T18:22:50 Z couplefire Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 364 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;

long long minimum_walk(vector<int> p, int s) {
    int n = p.size();
    vector<bool> visited(n, 0);
    vector<vector<int>> cycles;
    long long ans = 0;
    for(int i = 0; i<n; i++) ans += abs(p[i]-i);
    for(int i = 0; i<n; i++){
        if(visited[p[i]]) continue;
        cycles.push_back({});
        int j = p[i];
        while(!visited[j]){
            visited[j] = 1;
            cycles.back().push_back(j);
            j = p[j];
        }
    }
    vector<int> del(n+1, 0);
    vector<int> add(n+1, 0);
    for(auto x : cycles){
        int mi = n, ma = -1;
        for(auto y : x){
            mi = min(mi, y);
            ma = max(ma, y);
        }
        add[mi]++;
        del[ma+1]++;
    }
    int cur = 0;
    int cnt = 0;
    for(int i = 0; i<n; i++){
        cur -= del[i];
        if(cur == 0 && i != 0) cnt++;
        cur += add[i];
    }
	return ans+2ll*cnt;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Incorrect 1 ms 364 KB 3rd lines differ - on the 1st token, expected: '4', found: '6'
6 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Incorrect 1 ms 364 KB 3rd lines differ - on the 1st token, expected: '4', found: '6'
6 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Incorrect 1 ms 364 KB 3rd lines differ - on the 1st token, expected: '4', found: '6'
6 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Incorrect 1 ms 364 KB 3rd lines differ - on the 1st token, expected: '4', found: '6'
6 Halted 0 ms 0 KB -