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Submission #119726

# Submission time Handle Problem Language Result Execution time Memory
119726 2019-06-22T03:08:46 Z thebes Ancient Books (IOI17_books) C++14
100 / 100
 483 ms 176172 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const int MN = 1e6+6;
ll n, s, x, id[MN], l[MN], r[MN], a[MN], b[MN], aa[MN], bb[MN], nxt, ans, arr[MN], i, j, par[MN], dist[MN], L=1<<30, R, vs[MN];
vector<int> adj[MN], rev[MN];
deque<int> q;

void dfs(ll n){
    ans += abs(arr[n]-n);
    a[id[n]]=min(a[id[n]],n);
    b[id[n]]=max(b[id[n]],n);
    if(n<=s) aa[id[n]]=max(aa[id[n]],n);
    if(n>=s) bb[id[n]]=min(bb[id[n]],n);
    if(id[arr[n]]) return;
    id[arr[n]]=id[n];
    dfs(arr[n]);
}

ll minimum_walk(vector<int> p,int e){
    n = p.size(); s = e+1;
    for(i=0;i<n;i++) arr[i+1]=p[i]+1;
    for(i=1;i<=n;i++){
        a[i] = bb[i] = 1<<30;
        if(!id[i]){
            id[i] = ++nxt;
            dfs(i);
        }
    }
    for(i=1;i<=nxt;i++){
        if(a[i]==b[i]) continue;
        L = min(L, a[i]);
        R = max(R, b[i]);
        if(a[i]<=s&&s<=b[i]){
            l[a[i]]++; l[b[i]]--;
            l[aa[i]]--; l[s]++;
            r[b[i]]++; r[a[i]]--;
            r[s]++; r[bb[i]]--;
            adj[aa[i]].push_back(bb[i]);
            adj[bb[i]].push_back(aa[i]);
        }
        else{
            l[a[i]]++; l[b[i]]--;
            r[b[i]]++; r[a[i]]--;
        }
    }
    if(R==0) return 0LL;
    for(i=1;i<=n;i++){
        x += l[i];
        if(x) adj[i+1].push_back(i);
    }
    x = 0;
    for(i=n;i>=1;i--){
        x += r[i];
        if(x) adj[i-1].push_back(i);
    }
    memset(dist,-1,sizeof(dist));
    q.push_back(s); dist[s] = 0;
    while(q.size()){
        x = q.front(); q.pop_front();
        if(vs[x]) continue;
        vs[x] = 1;
        for(auto v : adj[x]){
            if(dist[v]==-1||dist[x]<dist[v]){
                dist[v] = dist[x]; par[v] = x;
                q.push_front(v);
            }
        }
        if(x>1&&dist[x-1]==-1){
            dist[x-1] = dist[x]+1; par[x-1] = x;
            q.push_back(x-1);
        }
        if(x<n&&dist[x+1]==-1){
            dist[x+1] = dist[x]+1; par[x+1] = x;
            q.push_back(x+1);
        }
    }
    ans += 2*dist[L];
    memset(dist,-1,sizeof(dist));
    memset(vs,0,sizeof(vs));
    x = L;
    while(1){
        q.push_back(x);
        dist[x] = 0;
        if(!par[x]) break;
        x = par[x];
    }
    while(q.size()){
        x = q.front(); q.pop_front();
        if(vs[x]) continue;
        vs[x] = 1;
        for(auto v : adj[x]){
            if(dist[v]==-1||dist[x]<dist[v]){
                dist[v] = dist[x]; par[v] = x;
                q.push_front(v);
            }
        }
        if(x>1&&dist[x-1]==-1){
            dist[x-1] = dist[x]+1; par[x-1] = x;
            q.push_back(x-1);
        }
        if(x<n&&dist[x+1]==-1){
            dist[x+1] = dist[x]+1; par[x+1] = x;
            q.push_back(x+1);
        }
    }
    ans += 2*dist[R];
    return ans;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 62968 KB Output is correct
2 Correct 55 ms 62968 KB Output is correct
3 Correct 55 ms 63056 KB Output is correct
4 Correct 55 ms 62972 KB Output is correct
5 Correct 55 ms 62968 KB Output is correct
6 Correct 56 ms 62968 KB Output is correct
7 Correct 56 ms 63096 KB Output is correct
8 Correct 55 ms 62968 KB Output is correct
9 Correct 42 ms 47316 KB Output is correct
10 Correct 56 ms 63096 KB Output is correct
11 Correct 42 ms 47352 KB Output is correct
12 Correct 53 ms 62968 KB Output is correct
13 Correct 55 ms 62968 KB Output is correct
14 Correct 41 ms 47356 KB Output is correct
15 Correct 54 ms 62968 KB Output is correct
16 Correct 55 ms 62968 KB Output is correct
17 Correct 54 ms 62968 KB Output is correct
18 Correct 55 ms 62968 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 62968 KB Output is correct
2 Correct 55 ms 62968 KB Output is correct
3 Correct 55 ms 63056 KB Output is correct
4 Correct 55 ms 62972 KB Output is correct
5 Correct 55 ms 62968 KB Output is correct
6 Correct 56 ms 62968 KB Output is correct
7 Correct 56 ms 63096 KB Output is correct
8 Correct 55 ms 62968 KB Output is correct
9 Correct 42 ms 47316 KB Output is correct
10 Correct 56 ms 63096 KB Output is correct
11 Correct 42 ms 47352 KB Output is correct
12 Correct 53 ms 62968 KB Output is correct
13 Correct 55 ms 62968 KB Output is correct
14 Correct 41 ms 47356 KB Output is correct
15 Correct 54 ms 62968 KB Output is correct
16 Correct 55 ms 62968 KB Output is correct
17 Correct 54 ms 62968 KB Output is correct
18 Correct 55 ms 62968 KB Output is correct
19 Correct 54 ms 63096 KB Output is correct
20 Correct 54 ms 63124 KB Output is correct
21 Correct 42 ms 47352 KB Output is correct
22 Correct 54 ms 63096 KB Output is correct
23 Correct 55 ms 63224 KB Output is correct
24 Correct 56 ms 63096 KB Output is correct
25 Correct 55 ms 63096 KB Output is correct
26 Correct 55 ms 63096 KB Output is correct
27 Correct 53 ms 63096 KB Output is correct
28 Correct 54 ms 63224 KB Output is correct
29 Correct 54 ms 63096 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 62968 KB Output is correct
2 Correct 55 ms 62968 KB Output is correct
3 Correct 55 ms 63056 KB Output is correct
4 Correct 55 ms 62972 KB Output is correct
5 Correct 55 ms 62968 KB Output is correct
6 Correct 56 ms 62968 KB Output is correct
7 Correct 56 ms 63096 KB Output is correct
8 Correct 55 ms 62968 KB Output is correct
9 Correct 42 ms 47316 KB Output is correct
10 Correct 56 ms 63096 KB Output is correct
11 Correct 42 ms 47352 KB Output is correct
12 Correct 53 ms 62968 KB Output is correct
13 Correct 55 ms 62968 KB Output is correct
14 Correct 41 ms 47356 KB Output is correct
15 Correct 54 ms 62968 KB Output is correct
16 Correct 55 ms 62968 KB Output is correct
17 Correct 54 ms 62968 KB Output is correct
18 Correct 55 ms 62968 KB Output is correct
19 Correct 54 ms 63096 KB Output is correct
20 Correct 54 ms 63124 KB Output is correct
21 Correct 42 ms 47352 KB Output is correct
22 Correct 54 ms 63096 KB Output is correct
23 Correct 55 ms 63224 KB Output is correct
24 Correct 56 ms 63096 KB Output is correct
25 Correct 55 ms 63096 KB Output is correct
26 Correct 55 ms 63096 KB Output is correct
27 Correct 53 ms 63096 KB Output is correct
28 Correct 54 ms 63224 KB Output is correct
29 Correct 54 ms 63096 KB Output is correct
30 Correct 470 ms 141688 KB Output is correct
31 Correct 483 ms 141688 KB Output is correct
32 Correct 190 ms 94408 KB Output is correct
33 Correct 321 ms 148028 KB Output is correct
34 Correct 311 ms 148088 KB Output is correct
35 Correct 329 ms 152824 KB Output is correct
36 Correct 349 ms 157688 KB Output is correct
37 Correct 353 ms 157304 KB Output is correct
38 Correct 355 ms 153052 KB Output is correct
39 Correct 354 ms 151712 KB Output is correct
40 Correct 362 ms 144888 KB Output is correct
41 Correct 392 ms 141944 KB Output is correct
42 Correct 375 ms 142328 KB Output is correct
43 Correct 374 ms 163040 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 63096 KB Output is correct
2 Correct 53 ms 63184 KB Output is correct
3 Correct 55 ms 63096 KB Output is correct
4 Correct 56 ms 63096 KB Output is correct
5 Correct 57 ms 63224 KB Output is correct
6 Correct 56 ms 63096 KB Output is correct
7 Correct 56 ms 63124 KB Output is correct
8 Correct 55 ms 63096 KB Output is correct
9 Correct 57 ms 63096 KB Output is correct
10 Correct 44 ms 47352 KB Output is correct
11 Correct 62 ms 63096 KB Output is correct
12 Correct 56 ms 63068 KB Output is correct
13 Correct 83 ms 63152 KB Output is correct
14 Correct 57 ms 63144 KB Output is correct
15 Correct 55 ms 63096 KB Output is correct
16 Correct 56 ms 63096 KB Output is correct
17 Correct 56 ms 63100 KB Output is correct
18 Correct 55 ms 63096 KB Output is correct
19 Correct 55 ms 63096 KB Output is correct
20 Correct 66 ms 63096 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 62968 KB Output is correct
2 Correct 55 ms 62968 KB Output is correct
3 Correct 55 ms 63056 KB Output is correct
4 Correct 55 ms 62972 KB Output is correct
5 Correct 55 ms 62968 KB Output is correct
6 Correct 56 ms 62968 KB Output is correct
7 Correct 56 ms 63096 KB Output is correct
8 Correct 55 ms 62968 KB Output is correct
9 Correct 42 ms 47316 KB Output is correct
10 Correct 56 ms 63096 KB Output is correct
11 Correct 42 ms 47352 KB Output is correct
12 Correct 53 ms 62968 KB Output is correct
13 Correct 55 ms 62968 KB Output is correct
14 Correct 41 ms 47356 KB Output is correct
15 Correct 54 ms 62968 KB Output is correct
16 Correct 55 ms 62968 KB Output is correct
17 Correct 54 ms 62968 KB Output is correct
18 Correct 55 ms 62968 KB Output is correct
19 Correct 54 ms 63096 KB Output is correct
20 Correct 54 ms 63124 KB Output is correct
21 Correct 42 ms 47352 KB Output is correct
22 Correct 54 ms 63096 KB Output is correct
23 Correct 55 ms 63224 KB Output is correct
24 Correct 56 ms 63096 KB Output is correct
25 Correct 55 ms 63096 KB Output is correct
26 Correct 55 ms 63096 KB Output is correct
27 Correct 53 ms 63096 KB Output is correct
28 Correct 54 ms 63224 KB Output is correct
29 Correct 54 ms 63096 KB Output is correct
30 Correct 470 ms 141688 KB Output is correct
31 Correct 483 ms 141688 KB Output is correct
32 Correct 190 ms 94408 KB Output is correct
33 Correct 321 ms 148028 KB Output is correct
34 Correct 311 ms 148088 KB Output is correct
35 Correct 329 ms 152824 KB Output is correct
36 Correct 349 ms 157688 KB Output is correct
37 Correct 353 ms 157304 KB Output is correct
38 Correct 355 ms 153052 KB Output is correct
39 Correct 354 ms 151712 KB Output is correct
40 Correct 362 ms 144888 KB Output is correct
41 Correct 392 ms 141944 KB Output is correct
42 Correct 375 ms 142328 KB Output is correct
43 Correct 374 ms 163040 KB Output is correct
44 Correct 54 ms 63096 KB Output is correct
45 Correct 53 ms 63184 KB Output is correct
46 Correct 55 ms 63096 KB Output is correct
47 Correct 56 ms 63096 KB Output is correct
48 Correct 57 ms 63224 KB Output is correct
49 Correct 56 ms 63096 KB Output is correct
50 Correct 56 ms 63124 KB Output is correct
51 Correct 55 ms 63096 KB Output is correct
52 Correct 57 ms 63096 KB Output is correct
53 Correct 44 ms 47352 KB Output is correct
54 Correct 62 ms 63096 KB Output is correct
55 Correct 56 ms 63068 KB Output is correct
56 Correct 83 ms 63152 KB Output is correct
57 Correct 57 ms 63144 KB Output is correct
58 Correct 55 ms 63096 KB Output is correct
59 Correct 56 ms 63096 KB Output is correct
60 Correct 56 ms 63100 KB Output is correct
61 Correct 55 ms 63096 KB Output is correct
62 Correct 55 ms 63096 KB Output is correct
63 Correct 66 ms 63096 KB Output is correct
64 Correct 385 ms 170328 KB Output is correct
65 Correct 371 ms 176172 KB Output is correct
66 Correct 351 ms 166216 KB Output is correct
67 Correct 352 ms 165368 KB Output is correct
68 Correct 85 ms 73356 KB Output is correct
69 Correct 84 ms 73208 KB Output is correct
70 Correct 84 ms 73592 KB Output is correct
71 Correct 83 ms 73592 KB Output is correct
72 Correct 84 ms 74616 KB Output is correct
73 Correct 84 ms 72056 KB Output is correct
74 Correct 321 ms 160376 KB Output is correct
75 Correct 318 ms 159384 KB Output is correct
76 Correct 358 ms 173304 KB Output is correct
77 Correct 371 ms 174328 KB Output is correct
78 Correct 380 ms 172384 KB Output is correct
79 Correct 376 ms 174712 KB Output is correct
80 Correct 207 ms 108920 KB Output is correct
81 Correct 377 ms 172528 KB Output is correct
82 Correct 369 ms 172928 KB Output is correct
83 Correct 394 ms 169404 KB Output is correct
84 Correct 373 ms 168512 KB Output is correct
85 Correct 382 ms 166308 KB Output is correct
86 Correct 365 ms 165276 KB Output is correct
87 Correct 370 ms 175864 KB Output is correct
88 Correct 381 ms 173704 KB Output is correct
89 Correct 401 ms 170488 KB Output is correct
90 Correct 384 ms 164872 KB Output is correct
91 Correct 377 ms 162968 KB Output is correct
92 Correct 375 ms 153368 KB Output is correct