oj.uz

Submission #1011785

# Submission time Handle Problem Language Result Execution time Memory
1011785 2024-07-01T08:21:37 Z c2zi6 Ancient Books (IOI17_books) C++14
42 / 100
 235 ms 62116 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(1000);
        SEGTREE<(int)+2e9, less<PII>> mnval(1000);
        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 348 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 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 344 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 348 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 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 344 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 1 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 1 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 1 ms 348 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 344 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 1 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 1 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 1 ms 348 KB Output is correct
30 Correct 231 ms 55692 KB Output is correct
31 Correct 186 ms 55216 KB Output is correct
32 Correct 72 ms 30544 KB Output is correct
33 Incorrect 235 ms 62116 KB 3rd lines differ - on the 1st token, expected: '2121672', found: '2141260'
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 1 ms 348 KB Output is correct
3 Correct 1 ms 360 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 432 KB Output is correct
6 Correct 1 ms 436 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 544 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 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 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 1 ms 348 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 436 KB Output is correct
15 Correct 0 ms 344 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 1 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 1 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 1 ms 348 KB Output is correct
30 Correct 231 ms 55692 KB Output is correct
31 Correct 186 ms 55216 KB Output is correct
32 Correct 72 ms 30544 KB Output is correct
33 Incorrect 235 ms 62116 KB 3rd lines differ - on the 1st token, expected: '2121672', found: '2141260'
34 Halted 0 ms 0 KB -