oj.uz

Submission #1011615

# Submission time Handle Problem Language Result Execution time Memory
1011615 2024-06-30T21:15:34 Z c2zi6 Ancient Books (IOI17_books) C++14
70 / 100
 2000 ms 44232 KB 
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "books.h"

namespace TEST1 {
    map<VI, int> ans = {
        {{2, 3, 0, 1}, 8},
        {{2, 3, 1, 0}, 8},
        {{3, 2, 0, 1}, 8},
        {{3, 2, 1, 0}, 8},
        {{1, 0}, 2},
        {{}, 0}
    };
    ll solve(VI p, int S) {
        while (p.size() && p.back() == p.size()-1) p.pop_back();
        if (ans.count(p)) return ans[p];
        if (p.size() == 4) return 6;
        if (p.size() == 3) return 4;
        return ans[p];
    }
};
namespace TEST2 {
    ll solve(VI p, int s) {
        int n = p.size();
        VI vis(n);
        int upto = 0;
        ll ans = 0;
        rep(u, n) if (!vis[u]) {
            int v = u;
            if (v == p[v]) {
                vis[v] = true;
                continue;
            }
            if (v > upto) ans += 2*(v-upto);
            do {
                vis[v] = true;
                setmax(upto, v);
                ans += abs(p[v]-v);
                v = p[v];
            } while (v != u);
        }
        return ans;
    }
};
namespace TEST4 {
    int s;
    VI p;
    VI vis, group;
    ll ans;
    map<PII, VI> comps;
    PII getcomp(int s) {
        PII ret{s, s};
        int u = s;
        VI vec;
        do {
            vec.pb(u);
            vis[u] = true;
            setmin(ret.ff, u);
            setmax(ret.ss, u);
            ans += abs(p[u]-u);
            u = p[u];
        } while (u != s);
        for (int u : vec) comps[ret].pb(u);
        return ret;
    }
    PII skizbp;
    void compressranges(VPI& ranges) {
        int n = ranges.size();
        VI vis(n);
        function<void(int)> dfs;
        VI comp;
        dfs = [&](int u) {
            comp.pb(u);
            vis[u] = true;
            rep(v, n) if (!vis[v]) {
                if (ranges[v].ss < ranges[u].ff || ranges[v].ff > ranges[u].ss) continue;
                if (ranges[u].ff < ranges[v].ff && ranges[v].ss < ranges[u].ss) continue;
                if (ranges[v].ff < ranges[u].ff && ranges[u].ss < ranges[v].ss) continue;
                dfs(v);
            }
        };
        if (true) {
            VPI tmp;
            rep(u, n) if (!vis[u]) {
                comp.clear();
                dfs(u);
                PII ret = {+2e9, -2e9};
                for (int u : comp) {
                    setmin(ret.ff, ranges[u].ff);
                    setmax(ret.ss, ranges[u].ss);
                }
                VI vec;
                for (int u : comp) {
                    for (int x : comps[ranges[u]]) {
                        vec.pb(x);
                    }
                }
                comps[ret].clear();
                for (int x : vec) comps[ret].pb(x);
                if (u == 0) skizbp = ret;
                tmp.pb(ret);
            }
            ranges = tmp;
        }
        sort(all(ranges));
        PII glxavor = {s, s};
        int cur = -1;
        VPI roots;
        while (true) {
            auto it = upper_bound(all(ranges), PII{cur, +2e9});
            if (it == ranges.end()) break;
            roots.pb(*it);
            if (it->ff <= s && s <= it->ss) {
                glxavor = *it;
            }
            cur = it->ss;
        }
        replr(i, 1, roots.size()-1) {
            ans += (roots[i].ff - roots[i-1].ss)*2;
        }

        VPI tmp{glxavor};
        for (PII p : ranges) {
            if (glxavor.ff < p.ff && p.ss < glxavor.ss) {
                tmp.pb(p);
            }
        }
        ranges = tmp;
    }
    ll solve(VI PARG, int SARG) {p = PARG, s = SARG;
        VPI ranges;
        vis = VI(p.size());
        group = VI(p.size(), -1);
        ranges.pb(getcomp(s));
        rep(u, p.size()) if (u != p[u] && !vis[u]) ranges.pb(getcomp(u));
        compressranges(ranges);
        sort(all(ranges), [&](PII a, PII b){
                    swap(a.ff, a.ss);
                    swap(b.ff, b.ss);
                    return a < b;
                });
        int n = ranges.size();
        VPI points;
        rep(i, n) {
            for (int x : comps[ranges[i]]) {
                points.pb({x, i});
            }
        }
        sort(all(points));
        VVPI gp(n);
        rep(u, n) {
            auto[l, r] = ranges[u];
            VPI::iterator(it);
            it = upper_bound(all(points), PII{r, +2e9});
            if (it != points.end()) {
                gp[u].pb({it->ss, (it->ff-r)*2});
            }
            it = lower_bound(all(points), PII{l, -2e9});
            if (it != points.begin()) {it--;
                gp[u].pb({it->ss, (l-it->ff)*2});
            }
        }

        int start = -1;
        rep(i, n) if (ranges[i] == skizbp) start = i;

        priority_queue<PLL> pq;
        VL dist(n, 1e18);
        VI vis(n);
        pq.push({0, start});
        dist[start] = 0;
        while (pq.size()) {
            int u = pq.top().ss;
            pq.pop();
            if (vis[u]) continue;
            vis[u] = true;
            for (auto[v, w] : gp[u]) {
                if (dist[u] + w < dist[v]) {
                    dist[v] = dist[u] + w;
                    pq.push({-dist[v], v});
                }
            }
        }

        return ans + dist.back();
    }
}


ll minimum_walk(VI p, int s) {
    if (s == 0) return TEST2::solve(p, s);
    return TEST4::solve(p, s);
}

Compilation message

books.cpp: In function 'll TEST1::solve(VI, int)':
books.cpp:44:37: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         while (p.size() && p.back() == p.size()-1) p.pop_back();
      |                            ~~~~~~~~~^~~~~~~~~~~~~
books.cpp: In function 'll TEST4::solve(VI, int)':
books.cpp:181:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  181 |             auto[l, r] = ranges[u];
      |                 ^
books.cpp:182:26: warning: unnecessary parentheses in declaration of 'it' [-Wparentheses]
  182 |             VPI::iterator(it);
      |                          ^
books.cpp:206:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  206 |             for (auto[v, w] : gp[u]) {
      |                      ^

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 82 ms 15856 KB Output is correct
31 Correct 76 ms 15860 KB Output is correct
32 Correct 66 ms 15868 KB Output is correct
33 Correct 91 ms 15952 KB Output is correct
34 Correct 70 ms 22612 KB Output is correct
35 Correct 80 ms 22620 KB Output is correct
36 Correct 72 ms 22608 KB Output is correct
37 Correct 67 ms 22844 KB Output is correct
38 Correct 64 ms 22632 KB Output is correct
39 Correct 69 ms 22632 KB Output is correct
40 Correct 68 ms 22612 KB Output is correct
41 Correct 110 ms 22772 KB Output is correct
42 Correct 74 ms 22620 KB Output is correct
43 Correct 82 ms 22768 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 82 ms 15856 KB Output is correct
31 Correct 76 ms 15860 KB Output is correct
32 Correct 66 ms 15868 KB Output is correct
33 Correct 91 ms 15952 KB Output is correct
34 Correct 70 ms 22612 KB Output is correct
35 Correct 80 ms 22620 KB Output is correct
36 Correct 72 ms 22608 KB Output is correct
37 Correct 67 ms 22844 KB Output is correct
38 Correct 64 ms 22632 KB Output is correct
39 Correct 69 ms 22632 KB Output is correct
40 Correct 68 ms 22612 KB Output is correct
41 Correct 110 ms 22772 KB Output is correct
42 Correct 74 ms 22620 KB Output is correct
43 Correct 82 ms 22768 KB Output is correct
44 Correct 1 ms 344 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 1 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 1 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Execution timed out 2047 ms 44232 KB Time limit exceeded
65 Halted 0 ms 0 KB -