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Submission #1073864

# Submission time Handle Problem Language Result Execution time Memory
1073864 2024-08-25T00:33:08 Z ArthuroWich Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 348 KB 
#include "books.h"
#include<bits/stdc++.h>
using namespace std;
int minl, maxr;
vector<int> pref, f1, f2, dp;
long long minimum_walk(vector<int> p, int s) {
    long long int ans = 0, n = p.size();
    pref.resize(n+1, 0);
    f1.resize(n, 0);
    f2.resize(n, 0);
    minl = INT_MAX;
    maxr = 0;
    for (int i = 0; i < n; i++) {
        ans += abs(i-p[i]);
    }
    vector<pair<int, int>> cycles;
    vector<int> vis(n, 0);
    for (int i = 0; i < n; i++) {
        if (p[i] == i || vis[i]) {
            continue;
        }
        int a = i, l = i, r = i;
        vis[i] = 1;
        a = p[i];
        vis[a] = 1;
        l = min(l, a);
        r = max(r, a);
        while(a != i) {
            a = p[a];
            vis[a] = 1;
            l = min(l, a);
            r = max(r, a);
        }
        minl = min(minl, l);
        maxr = max(maxr, r);
        cycles.push_back({min(l, r), max(l, r)});
    }
    for (auto [i, j] : cycles) {
        pref[i] += 1;
        pref[j] -= 1; 
    }
    for (int i = 1; i < n; i++) {
        pref[i] += pref[i-1];
    }
    for (int i = 0; i < n; i++) {
        if (pref[i] > 0) {
            f1[i] = 1;
        }
        if (i > 0) {
            f1[i] |= f1[i-1];
        }
    }
    for (int i = n-1; i >= 0; i--) {
        if (pref[i] > 0) {
            f2[i] = 1;
        }
        if (i < n-1) {
            f2[i] |= f2[i+1];
        }
    }
    for (int i = n-1; i >= 0; i--) {
        if (f1[i] && f2[i] && pref[i] == 0) {
            ans += 2;
        }
    }
    return ans;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 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 Incorrect 1 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -