oj.uz

Submission #429140

# Submission time Handle Problem Language Result Execution time Memory
429140 2021-06-15T17:47:38 Z Dremix10 Ancient Books (IOI17_books) C++17
50 / 100
 417 ms 28084 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;
#define endl '\n'
#define F first
#define S second
#define all(x) (x).begin(),(x).end()
const int N = 1e6+5;
const ll INF = 2e18;
const int MOD = 1e9+7;

int l[N],r[N],par[N];

int find(int x){
    return (par[x] == x) ? x : par[x] = find(par[x]);
}

void join(int x, int y){
    x = find(x);
    y = find(y);
    if(x==y)return;
    par[y] = x;
    l[x] = min(l[x],l[y]);
    r[x] = max(r[x],r[y]);
}

long long minimum_walk(vector<int> p, int s) {
    int i,j,n = p.size();

    ll ans = 0;
    bool ok[n] = {};
    int cnt = 0;

    for(i=0;i<n;i++){
        if(p[i] == i){
            ok[i] = true;
            cnt++;
        }
        l[i] = i,r[i] = i,par[i] = i;
    }

    i = 0;

    while(cnt < n){
        while(ok[i]){
            i++;
            //ans++;
        }
        int fin = i;
        ans += abs(p[i] - i);
        i = p[i];
        ok[i] = true;
        cnt++;
        while(i != fin){
            join(i,fin);
            ans += abs(p[i] - i);
            i = p[i];
            ok[i] = true;
            cnt++;
        }
        //cout<<cnt<<" "<<ans<<" "<<i<<endl;
    }

    int low=s,high=s;
    i=s,j=s;
    while(i>0 || j<n-1){
        int curr;
        if(i >= 0)
            curr = find(i);
        else
            curr = find(j);
        bool ok = 0;

        low = min(low,l[curr]);
        while(i > low){
            i--;
            ok = 1;
            join(curr,i);
            low = min(low,l[curr]);
        }

        high = max(high,r[curr]);
        while(j < high){
            j++;
            ok = 1;
            join(curr,j);
            high = max(high,r[curr]);
        }

        if(!ok){
            i--;
            while(i>=0 && i==par[i])
                i--;

            j++;
            while(j<n && j==par[j])
                j++;

            if(i==-1 && j==n)break;
            if(i==-1 || j<n && low-i > j-high){
                /// go right (high)
                int nhigh = max(high,r[find(j)]);
                int nlow = min(low,l[find(j)]);
                int jj = j;
                while(j < nhigh){
                    j++;
                    nhigh = max(nhigh,r[find(j)]);
                    nlow = min(nlow,l[find(j)]);
                }
                if(i!=-1 && nlow == low){
                    ans += (low-i)*2;
                    join(curr,i);
                    j = high;
                }
                else{
                    j = jj;
                    ans += (j-high)*2;
                    join(curr,j);
                    i = low;
                }
            }
            else{
                assert(j==n || i>=0 && low-i < j-high);
                /// go left (low)
                int nhigh = max(high,r[find(i)]);
                int nlow = min(low,l[find(i)]);
                int ii = i;
                while(i > nlow){
                    i--;
                    nhigh = max(nhigh,r[find(i)]);
                    nlow = min(nlow,l[find(i)]);
                }
                if(j!=n && nhigh == high){
                    ans += (j-high)*2;
                    join(curr,j);
                    i = low;
                }
                else{
                    i = ii;
                    ans += (low-i)*2;
                    join(curr,i);
                    j = high;
                }
            }
        }
    }

    return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:103:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  103 |             if(i==-1 || j<n && low-i > j-high){
      |                         ~~~~^~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from books.cpp:2:
books.cpp:126:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  126 |                 assert(j==n || i>=0 && low-i < j-high);
      |                                ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 417 ms 28084 KB Output is correct
31 Correct 404 ms 23224 KB Output is correct
32 Correct 121 ms 20732 KB Output is correct
33 Correct 149 ms 20828 KB Output is correct
34 Correct 145 ms 20716 KB Output is correct
35 Correct 162 ms 20732 KB Output is correct
36 Correct 157 ms 20708 KB Output is correct
37 Correct 157 ms 20804 KB Output is correct
38 Correct 201 ms 20976 KB Output is correct
39 Correct 162 ms 20840 KB Output is correct
40 Correct 199 ms 21100 KB Output is correct
41 Correct 308 ms 23420 KB Output is correct
42 Correct 227 ms 22512 KB Output is correct
43 Correct 157 ms 20712 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 460 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 417 ms 28084 KB Output is correct
31 Correct 404 ms 23224 KB Output is correct
32 Correct 121 ms 20732 KB Output is correct
33 Correct 149 ms 20828 KB Output is correct
34 Correct 145 ms 20716 KB Output is correct
35 Correct 162 ms 20732 KB Output is correct
36 Correct 157 ms 20708 KB Output is correct
37 Correct 157 ms 20804 KB Output is correct
38 Correct 201 ms 20976 KB Output is correct
39 Correct 162 ms 20840 KB Output is correct
40 Correct 199 ms 21100 KB Output is correct
41 Correct 308 ms 23420 KB Output is correct
42 Correct 227 ms 22512 KB Output is correct
43 Correct 157 ms 20712 KB Output is correct
44 Runtime error 2 ms 460 KB Execution killed with signal 6
45 Halted 0 ms 0 KB -