oj.uz

Submission #799516

# Submission time Handle Problem Language Result Execution time Memory
799516 2023-07-31T15:32:17 Z PixelCat Ancient Books (IOI17_books) C++14
50 / 100
 124 ms 35552 KB 
#include "books.h"

#ifdef NYAOWO
#include "grader.cpp"
#endif

#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i <= b; i++)
#define Forr(i, a, b) for(int i = a; i >= b; i--)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sz(x) ((int)x.size())
#define eb emplace_back
#define int LL
using namespace std;
using i32 = int32_t;
using LL = long long;
using pii = pair<int, int>;

const int MAXN = 1'000'000;
const int INF = 1e18;

LL minimum_walk(vector<i32> p, i32 s) {
    assert(s >= 0);
    int n = sz(p);

    int ans = 0;
    vector<int> cid(n, -1);
    vector<pii> range;
    For(i, 0, n - 1) if(p[i] != i && cid[i] == -1) {
        int cur = i;
        int l = n + 1;
        int r = -1;
        do {
            l = min(l, cur);
            r = max(r, cur);
            ans += abs(p[cur] - cur);
            cur = p[cur];
            cid[cur] = sz(range);
        } while(cur != i);
        range.eb(l, r);
    }
    if(sz(range) == 0) return 0;

    int L = 0, R = n - 1;
    while(cid[L] == -1) L++;
    while(cid[R] == -1) R--;
    L = min(L, (int)s);
    R = max(R, (int)s);
    cerr << L << " " << R << "\n";

    vector<int> nxtl(n), nxtr(n);
    nxtl[0] = -INF;
    For(i, 1, n - 1) {
        if(cid[i - 1] != -1) nxtl[i] = i - 1;
        else nxtl[i] = nxtl[i - 1];
    }
    nxtr[n - 1] = INF;
    Forr(i, n - 2, 0) {
        if(cid[i + 1] != -1) nxtr[i] = i + 1;
        else nxtr[i] = nxtr[i + 1];
    }

    int l = s, r = s;
    queue<int> que;
    if(cid[s] != -1) que.emplace(cid[s]);
    while(l > L && r < R) {
        while(sz(que)) {
            int id = que.front(); que.pop();
            pii rg = range[id];
            while(l > rg.F) {
                l--;
                if(cid[l] != -1) que.emplace(cid[l]);
            }
            while(r < rg.S) {
                r++;
                if(cid[r] != -1) que.emplace(cid[r]);
            }
        }
        if(l > L || r < R) {
            int l2, r2;

            int cl = 0;
            l2 = l; r2 = r;
            if(l2 == L) cl = INF;
            while(r2 == r && l2 != L) {
                cl += (l2 - nxtl[l2]) * 2;
                l2 = nxtl[l2];
                int l3 = range[cid[l2]].F;
                int r3 = range[cid[l2]].S;
                while(l2 > l3 || r2 < r3) {
                    if(r2 < r3) {
                        l2 = l3; r2 = r3;
                        break;
                    }
                    l2--;
                    if(cid[l2] != -1) {
                        l3 = min(l3, range[cid[l2]].F);
                        r3 = max(r3, range[cid[l2]].S);
                    }
                }
            }
            int l8 = l2, r8 = r2;

            int cr = 0;
            l2 = l; r2 = r;
            if(r2 == R) cr = INF;
            while(l2 == l && r2 != R) {
                cr += (nxtr[r2] - r2) * 2;
                r2 = nxtr[r2];
                int l3 = range[cid[r2]].F;
                int r3 = range[cid[r2]].S;
                while(l2 > l3 || r2 < r3) {
                    if(l2 > l3) {
                        l2 = l3; r2 = r3;
                        break;
                    }
                    r2++;
                    if(cid[r2] != -1) {
                        l3 = min(l3, range[cid[r2]].F);
                        r3 = max(r3, range[cid[r2]].S);
                    }
                }
            }
            assert(l8 == l2 && r8 == r2);

            ans += min(cl, cr);
            l = l2; r = r2;
        }
    }
    {
        int mx = r;
        For(i, r, R) if(cid[i] != -1) {
            ans += 2 * max(0ll, i - mx);
            mx = max(mx, range[cid[i]].S);
        }
    }
    {
        int mn = l;
        Forr(i, l, L) if(cid[i] != -1) {
            ans += 2 * max(0ll, mn - i);
            mn = min(mn, range[cid[i]].F);
        }
    }
    return ans;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 340 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 119 ms 31596 KB Output is correct
31 Correct 108 ms 31592 KB Output is correct
32 Correct 76 ms 15904 KB Output is correct
33 Correct 99 ms 34776 KB Output is correct
34 Correct 100 ms 34772 KB Output is correct
35 Correct 100 ms 35108 KB Output is correct
36 Correct 95 ms 34144 KB Output is correct
37 Correct 92 ms 32112 KB Output is correct
38 Correct 116 ms 31720 KB Output is correct
39 Correct 88 ms 31728 KB Output is correct
40 Correct 91 ms 31600 KB Output is correct
41 Correct 112 ms 31592 KB Output is correct
42 Correct 124 ms 31604 KB Output is correct
43 Correct 123 ms 35552 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Runtime error 1 ms 468 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 119 ms 31596 KB Output is correct
31 Correct 108 ms 31592 KB Output is correct
32 Correct 76 ms 15904 KB Output is correct
33 Correct 99 ms 34776 KB Output is correct
34 Correct 100 ms 34772 KB Output is correct
35 Correct 100 ms 35108 KB Output is correct
36 Correct 95 ms 34144 KB Output is correct
37 Correct 92 ms 32112 KB Output is correct
38 Correct 116 ms 31720 KB Output is correct
39 Correct 88 ms 31728 KB Output is correct
40 Correct 91 ms 31600 KB Output is correct
41 Correct 112 ms 31592 KB Output is correct
42 Correct 124 ms 31604 KB Output is correct
43 Correct 123 ms 35552 KB Output is correct
44 Correct 0 ms 340 KB Output is correct
45 Runtime error 1 ms 468 KB Execution killed with signal 6
46 Halted 0 ms 0 KB -