oj.uz

Submission #1011791

# Submission time Handle Problem Language Result Execution time Memory
1011791 2024-07-01T08:24:23 Z c2zi6 Ancient Books (IOI17_books) C++14
70 / 100
 492 ms 103352 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"

template<int BASE, typename COMP>
struct SEGTREE {
    int n;
    VPI tree;
    COMP COMPOBJ;
    SEGTREE(int sz) {
        n = 1;
        while (n < sz) n *= 2;
        tree = VPI(2*n, {BASE, -1});
    }
    PII lav(PII a, PII b) {
        if (COMPOBJ(a, b)) return a;
        return b;
    }
    void upd(int N, int L, int R, int i, PII s) {
        if (i < L || i > R) return;
        if (L == R) {
            tree[N] = s;
            return;
        }
        int M = (L + R) / 2;
        upd(2*N+1, L, M, i, s);
        upd(2*N+2, M+1, R, i, s);
        tree[N] = lav(tree[2*N+1], tree[2*N+2]);
    }
    PII get(int N, int L, int R, int l, int r) {
        if (l <= L && R <= r) return tree[N];
        if (R < l || L > r) return {BASE, -1};
        int M = (L + R) / 2;
        return lav(get(2*N+1, L, M, l, r), get(2*N+2, M+1, R, l, r));
    }
    void upd(int i, PII s) {
        upd(0, 0, n-1, i, s);
    }
    PII get(int l, int r) {
        if (l > r) return {BASE, -1};
        return get(0, 0, n-1, l, r);
    }
};

namespace TEST5 {
    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;
        SEGTREE<(int)-2e9, greater<PII>> mxval(p.size());
        SEGTREE<(int)+2e9, less<PII>> mnval(p.size());
        rep(i, n) {
            auto[l, r] = ranges[i];
            mxval.upd(l, {r, i});
            /*cout << "AT " << l << " SAT {" << r << ", " << i << "}" << endl;*/
            mnval.upd(r, {l, i});
        }
        /*cout << "NOW PRINTING THE GRAPH" << endl;*/
        VVI gp(n);
        rep(u, n) {
            auto[l, r] = ranges[u];
            PII p1 = mxval.get(l+1, r-1);
            if (p1.ff > r) {
                gp[u].pb(p1.ss);
                gp[p1.ss].pb(u);
            }
            PII p2 = mnval.get(l+1, r-1);
            if (p2.ff < l) {
                gp[u].pb(p2.ss);
                gp[p2.ss].pb(u);
            }
        }
        /*cout << "ENDED" << endl;*/
        dfs = [&](int u) {
            comp.pb(u);
            vis[u] = true;
            VI harevan;
            for (int v : gp[u]) if (!vis[v]) {
                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));
        /*int q;*/
        /*cin >> q;*/
        /*while (q--) {*/
        /*    int l, r;*/
        /*    cin >> l >> r;*/
        /*    ranges.pb({l, r});*/
        /*}*/
        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();
    }
}

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 TEST5::solve(p, s);
}

Compilation message

books.cpp: In function 'void TEST5::compressranges(VPI&)':
books.cpp:104:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  104 |             auto[l, r] = ranges[i];
      |                 ^
books.cpp:112:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  112 |             auto[l, r] = ranges[u];
      |                 ^
books.cpp: In function 'll TEST5::solve(VI, int)':
books.cpp:210:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  210 |             auto[l, r] = ranges[u];
      |                 ^
books.cpp:211:26: warning: unnecessary parentheses in declaration of 'it' [-Wparentheses]
  211 |             VPI::iterator(it);
      |                          ^
books.cpp:235:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  235 |             for (auto[v, w] : gp[u]) {
      |                      ^
books.cpp: In function 'll TEST4::solve(VI, int)':
books.cpp:354:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  354 |             auto[l, r] = ranges[u];
      |                 ^
books.cpp:355:26: warning: unnecessary parentheses in declaration of 'it' [-Wparentheses]
  355 |             VPI::iterator(it);
      |                          ^
books.cpp:379:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  379 |             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 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 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 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 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
23 Correct 1 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 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 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 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 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
23 Correct 1 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 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 211 ms 72776 KB Output is correct
31 Correct 203 ms 71416 KB Output is correct
32 Correct 83 ms 56672 KB Output is correct
33 Correct 284 ms 89624 KB Output is correct
34 Correct 280 ms 96304 KB Output is correct
35 Correct 316 ms 101952 KB Output is correct
36 Correct 281 ms 96708 KB Output is correct
37 Correct 186 ms 76636 KB Output is correct
38 Correct 134 ms 73040 KB Output is correct
39 Correct 133 ms 73052 KB Output is correct
40 Correct 121 ms 71488 KB Output is correct
41 Correct 149 ms 73576 KB Output is correct
42 Correct 120 ms 72700 KB Output is correct
43 Correct 492 ms 103352 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 440 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 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 436 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 604 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 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 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
23 Correct 1 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 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 211 ms 72776 KB Output is correct
31 Correct 203 ms 71416 KB Output is correct
32 Correct 83 ms 56672 KB Output is correct
33 Correct 284 ms 89624 KB Output is correct
34 Correct 280 ms 96304 KB Output is correct
35 Correct 316 ms 101952 KB Output is correct
36 Correct 281 ms 96708 KB Output is correct
37 Correct 186 ms 76636 KB Output is correct
38 Correct 134 ms 73040 KB Output is correct
39 Correct 133 ms 73052 KB Output is correct
40 Correct 121 ms 71488 KB Output is correct
41 Correct 149 ms 73576 KB Output is correct
42 Correct 120 ms 72700 KB Output is correct
43 Correct 492 ms 103352 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 1 ms 348 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 1 ms 440 KB Output is correct
50 Correct 1 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 1 ms 348 KB Output is correct
57 Correct 1 ms 344 KB Output is correct
58 Correct 1 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 436 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 1 ms 604 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Incorrect 245 ms 83712 KB 3rd lines differ - on the 1st token, expected: '9339550', found: '9339552'
65 Halted 0 ms 0 KB -