oj.uz

Submission #638815

# Submission time Handle Problem Language Result Execution time Memory
638815 2022-09-07T14:43:35 Z qwerasdfzxcl Ancient Books (IOI17_books) C++17
100 / 100
 643 ms 180004 KB 
#include "books.h"
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
int  n, s, ts, ans, a[1001000], cycL[1001000], cycR[1001000], L[1001000], R[1001000], dp[1001000];
bool visited[1001000];
ll cycsum;

struct Seg{
    int tree[2002000], sz;
    void init(int n){
        sz = n;
        fill(tree, tree+sz*2, 1e9);
    }
    void update(int p, int x){
        for (tree[p+=sz]=x;p>1;p>>=1) tree[p>>1] = min(tree[p], tree[p^1]);
    }
    int query(int l, int r){
        int ret = 1e9;
        ++r;
        for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
            if (l&1) ret = min(ret, tree[l++]);
            if (r&1) ret = min(ret, tree[--r]);
        }
        return ret;
    }
}tree1, tree2;

ll myabs(ll x){
    if (x<0) return -x;
    return x;
}


void dfs(int l, int r){
    //printf("dfs: %d %d\n", l, r);
    if (l==L[ts] && r==R[ts]) {ans += dp[L[ts]]; return;}

    vector<pair<int, int>> child;
    for (int i=l+1;i<r;){
        if (R[i]<r){
            child.emplace_back(i, R[i]);
            i = R[i] + 1;
        }
        else i++;
    }

    vector<int> gl = {1}, gr = {1};
    for (int i=1;i<(int)child.size();i++){
        if (child[i-1].second+1==child[i].first) gl.push_back(gl.back()+1);
        else gl.push_back(1);
    }
    for (int i=(int)child.size()-2;i>=0;i--){
        if (child[i].second+1==child[i+1].first) gr.push_back(gr.back()+1);
        else gr.push_back(1);
    }
    reverse(gr.begin(), gr.end());

    for (int i=0;i<(int)child.size();i++) dp[child[i].first] = min(gl[i], gr[i]) + dp[l];
    if (l==0) for (int i=0;i<(int)child.size();i++) dp[child[i].first] = (int)child.size()-1;

    for (auto &[nl, nr]:child) dfs(nl, nr);
}

map<pair<int, int>, int> mp;
void naive(int s){
    int ptl = s, ptr = s;
    while(true){
        int nl = tree1.query(ptl, ptr);
        int nr = -tree2.query(ptl, ptr);

        if (nl==ptl && nr==ptr) {L[s] = nl, R[s] = nr; break;}
        if (mp.find(make_pair(nl, nr))!=mp.end()) {
            int tmp = mp[make_pair(nl, nr)];
            L[s] = L[tmp], R[s] = R[tmp];
            break;
        }

        mp[make_pair(nl, nr)] = s;
        ptl = nl, ptr = nr;

    }
}

long long minimum_walk(std::vector<int> P, int S) {
    int si = 0, ei = (int)P.size()-1;
    for(;si<(int)P.size() && P[si]==si;si++);
    for(;ei>=0 && P[ei]==ei;ei--);

    if (si > ei) return 0;
    n = ei-si+1;
    for (int i=si;i<=ei;i++) a[i-si+1] = P[i] - si + 1;
    s = S-si+1;

    tree1.init(n+1);
    tree2.init(n+1);
    for (int i=1;i<=n;i++) if (!visited[i]){
        vector<int> cyc;

        for (int j=i;!visited[j];j=a[j]){
            cyc.push_back(j);
            visited[j] = 1;
            cycR[i] = max(cycR[i], j);
            cycsum += myabs(j - a[j]);
        }
        cycL[cycR[i]] = i;

        for (auto &x:cyc){
            tree1.update(x, i);
            tree2.update(x, -cycR[i]);
        }
    }

    ///calc range
    for (int i=1;i<=n;i++) naive(i);

    /*for (int i=1;i<=n;i++) printf("(%d, %d) ", cycL[i], cycR[i]);
    printf("\n");
    for (int i=1;i<=n;i++) printf("(%d, %d) ", L[i], R[i]);
    printf("\n");*/

    if (s<=0) ts = 1, ans = 1-s;
    else if (s>n) ts = n, ans = s-n;
    else ts = s, ans = 0;

    //printf("ok n = %d, s = %d\n", n, s);
    dfs(0, n+1);

    //printf("%lld + %d * 2\n", cycsum, ans);
    return cycsum + ans * 2;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 308 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 304 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 308 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 304 KB Output is correct
18 Correct 0 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 308 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 304 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 308 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 304 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 436 KB Output is correct
25 Correct 1 ms 436 KB Output is correct
26 Correct 1 ms 308 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 1 ms 340 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 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 308 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 304 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 308 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 304 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 436 KB Output is correct
25 Correct 1 ms 436 KB Output is correct
26 Correct 1 ms 308 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 389 ms 39692 KB Output is correct
31 Correct 400 ms 39924 KB Output is correct
32 Correct 85 ms 9308 KB Output is correct
33 Correct 339 ms 76136 KB Output is correct
34 Correct 337 ms 76104 KB Output is correct
35 Correct 343 ms 73336 KB Output is correct
36 Correct 333 ms 63936 KB Output is correct
37 Correct 247 ms 51532 KB Output is correct
38 Correct 249 ms 47820 KB Output is correct
39 Correct 247 ms 46996 KB Output is correct
40 Correct 210 ms 40692 KB Output is correct
41 Correct 260 ms 38844 KB Output is correct
42 Correct 245 ms 39396 KB Output is correct
43 Correct 366 ms 61092 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 432 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 472 KB Output is correct
18 Correct 1 ms 472 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 308 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 304 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 308 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 304 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 436 KB Output is correct
25 Correct 1 ms 436 KB Output is correct
26 Correct 1 ms 308 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 389 ms 39692 KB Output is correct
31 Correct 400 ms 39924 KB Output is correct
32 Correct 85 ms 9308 KB Output is correct
33 Correct 339 ms 76136 KB Output is correct
34 Correct 337 ms 76104 KB Output is correct
35 Correct 343 ms 73336 KB Output is correct
36 Correct 333 ms 63936 KB Output is correct
37 Correct 247 ms 51532 KB Output is correct
38 Correct 249 ms 47820 KB Output is correct
39 Correct 247 ms 46996 KB Output is correct
40 Correct 210 ms 40692 KB Output is correct
41 Correct 260 ms 38844 KB Output is correct
42 Correct 245 ms 39396 KB Output is correct
43 Correct 366 ms 61092 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 432 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 468 KB Output is correct
55 Correct 1 ms 468 KB Output is correct
56 Correct 2 ms 340 KB Output is correct
57 Correct 2 ms 340 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 472 KB Output is correct
61 Correct 1 ms 472 KB Output is correct
62 Correct 1 ms 344 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 311 ms 62812 KB Output is correct
65 Correct 307 ms 61924 KB Output is correct
66 Correct 244 ms 56528 KB Output is correct
67 Correct 243 ms 55788 KB Output is correct
68 Correct 27 ms 6604 KB Output is correct
69 Correct 25 ms 6144 KB Output is correct
70 Correct 27 ms 6324 KB Output is correct
71 Correct 28 ms 6660 KB Output is correct
72 Correct 26 ms 6484 KB Output is correct
73 Correct 21 ms 5088 KB Output is correct
74 Correct 328 ms 81624 KB Output is correct
75 Correct 336 ms 81628 KB Output is correct
76 Correct 424 ms 70780 KB Output is correct
77 Correct 435 ms 70636 KB Output is correct
78 Correct 512 ms 78076 KB Output is correct
79 Correct 525 ms 77936 KB Output is correct
80 Correct 89 ms 14836 KB Output is correct
81 Correct 629 ms 179956 KB Output is correct
82 Correct 643 ms 180004 KB Output is correct
83 Correct 394 ms 84216 KB Output is correct
84 Correct 363 ms 78452 KB Output is correct
85 Correct 303 ms 65120 KB Output is correct
86 Correct 267 ms 58828 KB Output is correct
87 Correct 440 ms 117516 KB Output is correct
88 Correct 482 ms 110052 KB Output is correct
89 Correct 525 ms 90220 KB Output is correct
90 Correct 256 ms 56452 KB Output is correct
91 Correct 294 ms 55400 KB Output is correct
92 Correct 214 ms 46808 KB Output is correct