oj.uz

Submission #1011614

# Submission time Handle Problem Language Result Execution time Memory
1011614 2024-06-30T21:14:21 Z c2zi6 Ancient Books (IOI17_books) C++14
42 / 100
 2000 ms 55676 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) {
    return TEST4::solve(p, s);
    return TEST2::solve(p, s);
    if (p.size() <= 4) return TEST1::solve(p, s);
	return 0;
}

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 1 ms 600 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 0 ms 348 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 344 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 1 ms 600 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 0 ms 348 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 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 1 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 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 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 0 ms 348 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 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 1 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 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 180 ms 54768 KB Output is correct
31 Correct 187 ms 55676 KB Output is correct
32 Correct 68 ms 30544 KB Output is correct
33 Execution timed out 2068 ms 54344 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 432 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 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 1 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 1 ms 348 KB Output is correct
18 Correct 1 ms 504 KB Output is correct
19 Correct 1 ms 372 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 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 0 ms 348 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 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 1 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 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 180 ms 54768 KB Output is correct
31 Correct 187 ms 55676 KB Output is correct
32 Correct 68 ms 30544 KB Output is correct
33 Execution timed out 2068 ms 54344 KB Time limit exceeded
34 Halted 0 ms 0 KB -