oj.uz

Submission #109402

# Submission time Handle Problem Language Result Execution time Memory
109402 2019-05-06T11:40:27 Z JustasZ Ancient Books (IOI17_books) C++14
12 / 100
 47 ms 31736 KB 
#include "books.h"
#include <bits/stdc++.h>
#define pb push_back
#define x first
#define y second
#define all(a) a.begin(), a.end()
#define sz(a) (int)a.size()
#define rd() abs((int)rng())
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
const int maxn = 1e6 + 100;
const int mod = 1e9 + 7;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
int n, s, val[maxn], nxt, dist[maxn];
vector<vector<int> > edge;
vector<int>p;
vector<pii>adj[maxn];
ll ans;
void clr()
{
    for(int i = 1; i <= nxt; i++)
        adj[i].clear();
    ans = 0;
    nxt = 0;
    memset(val, 0, sizeof val);
}
ll minimum_walk(vector<int>perm, int S)
{
    clr();
    s = S;
    p = perm;
    n = sz(p);
    set<int>one;
    for(int i = 0; i < n; i++)
    {
        if(!val[i])
        {
            int col = ++nxt, cur = i, cnt = 0, chk = 0;
            while(!val[cur])
            {
                if(cur == s)
                    chk = 1;
                cnt++;
                val[cur] = col;
                ans += abs(p[cur] - cur);
                cur = p[cur];
            }
            if(cnt == 1 && !chk)
                one.insert(col);
        }
    }
    vector<int>belong[nxt + 1];
    for(int i = 0; i < n; i++)
        belong[val[i]].pb(i);
    edge = vector<vector<int> > (nxt + 1, vector<int>(nxt + 1, mod));
    for(int i = 0; i < n; i++)
    {
        for(int j = i + 1; j < n; j++)
        {
            if(val[i] != val[j])
                edge[val[i]][val[j]] = min(edge[val[i]][val[j]], j - i);
        }
    }
    for(int i = 1; i <= nxt; i++)
    {
        for(int j = 1; j <= nxt; j++)
        {
            if(i == j)
                continue;
            for(int a : belong[i])
            {
                for(int b : belong[j])
                {
                    if((a < b && p[a] > b) || (a > b && p[a] < b))
                        edge[i][j] = 0;
                }
            }
        }
    }
    for(int i = 1; i <= nxt; i++)
        for(int j = i + 1; j <= nxt; j++)
            {
                if((one.count(i) && i != val[s]) || (one.count(j) && j != val[s]))
                {
                    continue;
                }
                adj[i].pb({j, edge[i][j]});
                adj[j].pb({i, edge[j][i]});
            }

    for(int i = 1; i <= nxt; i++)
    {
        for(int j = 1; j <= nxt; j++)
        {
            if(i == j)
                continue;
            /*for(pii to : adj[i])
            {
                cout << i << " " << to.x << " " << to.y << endl;
            }*/
        }
    }
    set<pii>se;
    for(int i = 1; i <= nxt; i++)
        dist[i] = mod;
    se.insert({dist[val[s]] = 0, val[s]});
    while(sz(se))
    {
        int v = se.begin()->second;
        if(dist[v] != mod)
            ans += dist[v] * 2;
        //cout << v << " " << dist[v] << endl;
        se.erase(se.begin());
        for(pii to : adj[v])
        {
            if(dist[to.x] > to.y)
            {
                //cout << v << " " << to.x << " " << to.y << endl;
                if(dist[to.x] != mod)
                    se.erase({dist[to.x], to.x});
                dist[to.x] = to.y;
                se.insert({dist[to.x], to.x});
            }
        }
    }
    //int add = mod;
    //for(int i = 1; i <= nxt; i++)
    //    if(i != startcol) add = min(add, edge[i][startcol]);
    //ans += add;
    //cout << "Startcol: " << val[s] << endl;
    return ans;
}
/*int main()
{
    ios_base::sync_with_stdio(false), cin.tie(0);
    vector<int>perm;
    ifstream fin("in.txt");
    int n, s;
    fin >> n >> s;
    perm.resize(n);
    for(int i = 0; i < n; i++)
        fin >> perm[i];
    cout << minimum_walk(perm, s) << endl;
    //cout << minimum_walk({3, 2, 1, 0}, 0);
    return 0;
}*/

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 27776 KB Output is correct
2 Correct 32 ms 27776 KB Output is correct
3 Correct 30 ms 27768 KB Output is correct
4 Correct 28 ms 27676 KB Output is correct
5 Correct 32 ms 27768 KB Output is correct
6 Correct 27 ms 27776 KB Output is correct
7 Correct 28 ms 27776 KB Output is correct
8 Correct 31 ms 27776 KB Output is correct
9 Correct 29 ms 27776 KB Output is correct
10 Correct 31 ms 27736 KB Output is correct
11 Correct 30 ms 27668 KB Output is correct
12 Correct 27 ms 27648 KB Output is correct
13 Correct 31 ms 27768 KB Output is correct
14 Correct 27 ms 27776 KB Output is correct
15 Correct 30 ms 27768 KB Output is correct
16 Correct 28 ms 27776 KB Output is correct
17 Correct 27 ms 27772 KB Output is correct
18 Correct 33 ms 27768 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 27776 KB Output is correct
2 Correct 32 ms 27776 KB Output is correct
3 Correct 30 ms 27768 KB Output is correct
4 Correct 28 ms 27676 KB Output is correct
5 Correct 32 ms 27768 KB Output is correct
6 Correct 27 ms 27776 KB Output is correct
7 Correct 28 ms 27776 KB Output is correct
8 Correct 31 ms 27776 KB Output is correct
9 Correct 29 ms 27776 KB Output is correct
10 Correct 31 ms 27736 KB Output is correct
11 Correct 30 ms 27668 KB Output is correct
12 Correct 27 ms 27648 KB Output is correct
13 Correct 31 ms 27768 KB Output is correct
14 Correct 27 ms 27776 KB Output is correct
15 Correct 30 ms 27768 KB Output is correct
16 Correct 28 ms 27776 KB Output is correct
17 Correct 27 ms 27772 KB Output is correct
18 Correct 33 ms 27768 KB Output is correct
19 Correct 32 ms 27776 KB Output is correct
20 Correct 36 ms 27836 KB Output is correct
21 Correct 46 ms 31736 KB Output is correct
22 Incorrect 43 ms 30200 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2096'
23 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 27776 KB Output is correct
2 Correct 32 ms 27776 KB Output is correct
3 Correct 30 ms 27768 KB Output is correct
4 Correct 28 ms 27676 KB Output is correct
5 Correct 32 ms 27768 KB Output is correct
6 Correct 27 ms 27776 KB Output is correct
7 Correct 28 ms 27776 KB Output is correct
8 Correct 31 ms 27776 KB Output is correct
9 Correct 29 ms 27776 KB Output is correct
10 Correct 31 ms 27736 KB Output is correct
11 Correct 30 ms 27668 KB Output is correct
12 Correct 27 ms 27648 KB Output is correct
13 Correct 31 ms 27768 KB Output is correct
14 Correct 27 ms 27776 KB Output is correct
15 Correct 30 ms 27768 KB Output is correct
16 Correct 28 ms 27776 KB Output is correct
17 Correct 27 ms 27772 KB Output is correct
18 Correct 33 ms 27768 KB Output is correct
19 Correct 32 ms 27776 KB Output is correct
20 Correct 36 ms 27836 KB Output is correct
21 Correct 46 ms 31736 KB Output is correct
22 Incorrect 43 ms 30200 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2096'
23 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 47 ms 30300 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3512'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 27776 KB Output is correct
2 Correct 32 ms 27776 KB Output is correct
3 Correct 30 ms 27768 KB Output is correct
4 Correct 28 ms 27676 KB Output is correct
5 Correct 32 ms 27768 KB Output is correct
6 Correct 27 ms 27776 KB Output is correct
7 Correct 28 ms 27776 KB Output is correct
8 Correct 31 ms 27776 KB Output is correct
9 Correct 29 ms 27776 KB Output is correct
10 Correct 31 ms 27736 KB Output is correct
11 Correct 30 ms 27668 KB Output is correct
12 Correct 27 ms 27648 KB Output is correct
13 Correct 31 ms 27768 KB Output is correct
14 Correct 27 ms 27776 KB Output is correct
15 Correct 30 ms 27768 KB Output is correct
16 Correct 28 ms 27776 KB Output is correct
17 Correct 27 ms 27772 KB Output is correct
18 Correct 33 ms 27768 KB Output is correct
19 Correct 32 ms 27776 KB Output is correct
20 Correct 36 ms 27836 KB Output is correct
21 Correct 46 ms 31736 KB Output is correct
22 Incorrect 43 ms 30200 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2096'
23 Halted 0 ms 0 KB -