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답안 #247003

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
247003 2020-07-10T17:39:43 Z receed 우주 해적 (JOI14_space_pirate) C++14
47 / 100
 221 ms 9592 KB 
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <cassert>
#include <string>
#include <set>
#include <map>
#include <random>
#include <bitset>
#include <string>
#include <unordered_set>
#include <unordered_map>
#include <deque>
#include <queue>
#define rep(i, n) for (int i = 0; i < (n); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

using namespace std;
using ll = long long;
using ul = unsigned long long;
using ld = long double;

const int N = 100001;
vector<int> g[N], cl, l1;
ll a[N], pos[N], used[N], cyc[N], cnt[N], ps[N], st[N], vis[N], cu[N];
ll ans[N];

void dfs(int v) {
    used[v] = 1;
    for (int u : g[v])
        if (!used[u])
            dfs(u);
}

void dfs2(int v, int pos) {
    used[v] = 1;
    cnt[pos]++;
    pos--;
    if (pos < 0)
        pos = cl.size() - 1;
    for (int u : g[v])
        if (!cyc[u])
            dfs2(u, pos);
}

void dfs3(int v, int h, int fv, ll ck) {
    vis[v] = 1;
    st[h - 1] = v;
    ans[st[(h - ck % h) % h]]++;
    for (int u : g[v]) {
        if (u == fv)
            continue;
        dfs3(u, h + 1, fv, ck);
    }
}

void dfs4(int v, ll pos, int fv) {
    assert(vis[v] != 2);
    vis[v] = 2;
    ans[cl[pos]]++;
    for (int u : g[v])
        if (u != fv && cu[u] != 2)
            dfs4(u, (pos - 1 + (ll) cl.size()) % cl.size(), fv);
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    ll n, k;
    cin >> n >> k;
    rep(i, n) {
        cin >> a[i];
        a[i]--;
        g[a[i]].push_back(i);
        pos[i] = -1;
    }
    ll c = 0, v = 0, bl, u, dv, bd;
    while (pos[v] == -1) {
        l1.push_back(v);
        pos[v] = c++;
        v = a[v];
    }
    bl = c - pos[v];
    bd = pos[v];
    ll dvp = (k - bd) % bl;
    dv = l1[bd + dvp];
    dfs(v);
    ans[dv] += (n - c) * n;
    // rep(i, bl) {
    //     ll of = (i - dvp + bl) % bl;
    //     rep(i, bd)
    //         ans[l1[bd + i]] += (c - 2 - i - of + bl - 1) / bl;
    // }
    /*rep(i, bd)
        rep(j, c - 1 - i)
            ans[l1[((k - bd - j) % bl + bl) % bl + bd]]++;

    rep(i, n) {
        if (used[i])
            continue;
        u = i;
        cl.clear();
        while (pos[u] == -1) {
            pos[u] = -2;
            u = a[u];
        }
        while (!cyc[u]) {
            cnt[cl.size()] = 0;
            cl.push_back(u);
            cyc[u] = 1;
            u = a[u];
        }
        int cls = cl.size();
        rep(i, cls)
            dfs2(cl[i], i);
        rep(i, cls)
            ps[i + 1] = ps[i] + cnt[i];
        rep(i, cls) {
            cout << cl[i] << ' ' << cnt[i] << '\n';
            int rp = (i + k) % cls + 1, lp = (i + k - c % cls + 1) % cls;
            cout << ' ' << lp << ' ' << rp << '\n';
            if (lp < 0) {
                lp += cls;
                ans[cl[i]] += ps[cls];
            }
            ans[cl[i]] += c / cls * ps[cls] + ps[rp] - ps[lp];
        }
    }*/
    if (n <= 3000) {
        rep(i, c) {
            rep(j, n)
                vis[j] = cu[j] = 0;
            dfs3(l1[i], 1, l1[i], k - i);
            rep(j, n) {
                if (vis[j])
                    continue;
                cl.clear();
                u = j;
                while (!cu[u]) {
                    cu[u] = 1;
                    assert(!vis[u]);
                    u = a[u];
                }
                while (cu[u] == 1) {
                    cl.push_back(u);
                    cu[u] = 2;
                    assert(!vis[u]);
                    u = a[u];
                }
                rep(l, cl.size())
                    dfs4(cl[l], (l + k - i - 1) % cl.size(), l1[i]);
            }
        }
    }
    else {
        rep(i, n) 
            if (!used[i])
                ans[i] += c;
        ans[dv] += c;
        for (int i = 1; i < c; i++) {
            int pos = c - i + (k - 1) % i + 1;
            ans[l1[pos % c]] += c - pos;
            int cc = c - (c - pos);
            while (cc > 0) {
                pos = (pos + i) % c;
                ans[l1[pos]] += min(cc, i);
                cc -= min(cc, i);
            }
            // rep(j, c)
            //     cout << ans[l1[j]] << ' ';
            // cout << '\n';
        }
    }
    rep(i, n)
        cout << ans[i] << '\n';
}

Compilation message

space_pirate.cpp: In function 'int main()':
space_pirate.cpp:19:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define rep(i, n) for (int i = 0; i < (n); i++)
                                     ^
space_pirate.cpp:154:17: note: in expansion of macro 'rep'
                 rep(l, cl.size())
                 ^~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2688 KB Output is correct
3 Correct 7 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 7 ms 2816 KB Output is correct
6 Correct 6 ms 2688 KB Output is correct
7 Correct 6 ms 2688 KB Output is correct
8 Correct 6 ms 2688 KB Output is correct
9 Correct 6 ms 2688 KB Output is correct
10 Correct 6 ms 2688 KB Output is correct
11 Correct 6 ms 2688 KB Output is correct
12 Correct 6 ms 2688 KB Output is correct
13 Correct 6 ms 2688 KB Output is correct
14 Correct 6 ms 2688 KB Output is correct

Subtask #2
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2688 KB Output is correct
3 Correct 7 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 7 ms 2816 KB Output is correct
6 Correct 6 ms 2688 KB Output is correct
7 Correct 6 ms 2688 KB Output is correct
8 Correct 6 ms 2688 KB Output is correct
9 Correct 6 ms 2688 KB Output is correct
10 Correct 6 ms 2688 KB Output is correct
11 Correct 6 ms 2688 KB Output is correct
12 Correct 6 ms 2688 KB Output is correct
13 Correct 6 ms 2688 KB Output is correct
14 Correct 6 ms 2688 KB Output is correct
15 Correct 12 ms 2944 KB Output is correct
16 Correct 7 ms 2944 KB Output is correct
17 Correct 14 ms 2944 KB Output is correct
18 Correct 209 ms 3200 KB Output is correct
19 Correct 130 ms 3072 KB Output is correct
20 Correct 109 ms 3200 KB Output is correct
21 Correct 221 ms 3200 KB Output is correct
22 Correct 97 ms 3072 KB Output is correct
23 Correct 191 ms 3200 KB Output is correct
24 Correct 94 ms 3068 KB Output is correct
25 Correct 7 ms 2944 KB Output is correct
26 Correct 216 ms 3320 KB Output is correct
27 Correct 92 ms 3064 KB Output is correct
28 Correct 108 ms 3064 KB Output is correct

Subtask #3
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 36 ms 9592 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2688 KB Output is correct
2 Correct 6 ms 2688 KB Output is correct
3 Correct 7 ms 2816 KB Output is correct
4 Correct 6 ms 2816 KB Output is correct
5 Correct 7 ms 2816 KB Output is correct
6 Correct 6 ms 2688 KB Output is correct
7 Correct 6 ms 2688 KB Output is correct
8 Correct 6 ms 2688 KB Output is correct
9 Correct 6 ms 2688 KB Output is correct
10 Correct 6 ms 2688 KB Output is correct
11 Correct 6 ms 2688 KB Output is correct
12 Correct 6 ms 2688 KB Output is correct
13 Correct 6 ms 2688 KB Output is correct
14 Correct 6 ms 2688 KB Output is correct
15 Correct 12 ms 2944 KB Output is correct
16 Correct 7 ms 2944 KB Output is correct
17 Correct 14 ms 2944 KB Output is correct
18 Correct 209 ms 3200 KB Output is correct
19 Correct 130 ms 3072 KB Output is correct
20 Correct 109 ms 3200 KB Output is correct
21 Correct 221 ms 3200 KB Output is correct
22 Correct 97 ms 3072 KB Output is correct
23 Correct 191 ms 3200 KB Output is correct
24 Correct 94 ms 3068 KB Output is correct
25 Correct 7 ms 2944 KB Output is correct
26 Correct 216 ms 3320 KB Output is correct
27 Correct 92 ms 3064 KB Output is correct
28 Correct 108 ms 3064 KB Output is correct
29 Incorrect 36 ms 9592 KB Output isn't correct
30 Halted 0 ms 0 KB -