oj.uz

답안 #884636

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
884636 2023-12-07T19:34:44 Z tsumondai Hard route (IZhO17_road) C++14
52 / 100
 382 ms 97364 KB 
#include <bits/stdc++.h>
using namespace std;

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)
#define __TIME  (1.0 * clock() / CLOCKS_PER_SEC)

typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;

const int N = 1e6 + 5;

const int oo = 1e9, mod = 1e9 + 7;

int par[N], in[N], cnt[N], n, ans, res;
vector<int> adj[N];

bool maximize(int &a, const int b) {
    if (a < b) {
        a = b;
        return true;
    } return false;
}

void dfs(int u) {
    cnt[u] = 1;
    in[u] = 1;
    for (auto v : adj[u]) {
        if (v == par[u]) continue;
        par[v] = u;
        dfs(v);
        if (maximize(in[u], in[v] + 1)) cnt[u] = 0;
        if (in[u] == in[v] + 1) {
            cnt[u] += cnt[v];
        }
    }
}


void dp(int u, int out, int outc) {
    vector<ii> vt;
    if (u != 1)
        vt.emplace_back(out, outc);
    for (auto v : adj[u]) {
        if (v == par[u]) continue;
        vt.emplace_back(in[v], cnt[v]);
    }
    sort(vt.begin(), vt.end(), greater<ii>());
    if (vt.size() >= 3 && (vt[0].fi * (vt[1].fi + vt[2].fi)) >= res) {
        int curres = (vt[0].fi * (vt[1].fi + vt[2].fi)), curcnt = 0;
        int ba = 0;
        for (auto v : vt) {
            if (v.fi == vt[2].fi) ba += v.se;
        }
        if (vt[1].fi == vt[2].fi) {
            int cnt = 0;
            for (auto tmp : vt) {
                int x = tmp.fi, num = tmp.se;
                if (x == vt[1].fi) {
                    curcnt += cnt * num;
                    cnt += num;
                }
            }
        }
        else if (vt[0].fi == vt[1].fi) {
            curcnt = (vt[0].se + vt[1].se) * ba;
        }
        else  {
            curcnt = vt[1].se * ba;
        }
        if (maximize(res, curres)) ans = 0;
        ans += curcnt;
    }
    int mx1 = vt[0].fi, mx1c = 0, mx2 = 0, mx2c = 1;
    if (vt.size() >= 2) mx2 = vt[1].fi, mx2c = 0;
    for (auto tmp : vt) {
        int v = tmp.fi, num = tmp.se;
        if (v == mx1) mx1c += num;
        if (v == mx2) mx2c += num;
    }
    for (auto v : adj[u]) {
        if (v == par[u]) continue;
        if (in[v] == mx1) {
            if (cnt[v] == mx1c) dp(v, mx2 + 1, mx2c);
            else dp(v, mx1 + 1, mx1c - cnt[v]);
        }
        else dp(v, mx1 + 1, mx1c);
    }
}

void process() {
    cin >> n;
    ans = 1;
    foru(i,1,n-1) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    int flag = 1, cnt = 0;
    foru(i,1,n) {
        if (adj[i].size() > 2) flag = 0;
        if (adj[i].size() == 1) cnt++;
    }
    dfs(1);
    dp(1, 0, 1);
    cout << res << ' ' << ans << '\n';
    return;
}

signed main() {
    cin.tie(0)->sync_with_stdio(false);
    //freopen(".inp", "r", stdin);
    //freopen(".out", "w", stdout);
    process();
    cerr << "Time elapsed: " << __TIME << " s.\n";
    return 0;
}

// dont stop

Compilation message

road.cpp: In function 'void process()':
road.cpp:106:9: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
  106 |     int flag = 1, cnt = 0;
      |         ^~~~

Subtask #1
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27228 KB Output is correct
2 Correct 6 ms 27304 KB Output is correct
3 Correct 7 ms 27740 KB Output is correct
4 Correct 6 ms 27264 KB Output is correct
5 Correct 6 ms 27228 KB Output is correct
6 Correct 6 ms 27264 KB Output is correct
7 Correct 6 ms 27228 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27300 KB Output is correct
10 Correct 6 ms 27304 KB Output is correct
11 Correct 6 ms 27224 KB Output is correct
12 Correct 6 ms 27224 KB Output is correct
13 Correct 7 ms 27740 KB Output is correct
14 Correct 6 ms 27308 KB Output is correct
15 Correct 6 ms 27228 KB Output is correct
16 Correct 6 ms 27228 KB Output is correct
17 Correct 6 ms 27224 KB Output is correct
18 Correct 6 ms 27228 KB Output is correct
19 Correct 6 ms 27228 KB Output is correct
20 Correct 6 ms 27224 KB Output is correct
21 Correct 5 ms 27228 KB Output is correct
22 Correct 6 ms 27308 KB Output is correct
23 Correct 6 ms 27228 KB Output is correct
24 Correct 7 ms 27228 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27228 KB Output is correct
2 Correct 6 ms 27304 KB Output is correct
3 Correct 7 ms 27740 KB Output is correct
4 Correct 6 ms 27264 KB Output is correct
5 Correct 6 ms 27228 KB Output is correct
6 Correct 6 ms 27264 KB Output is correct
7 Correct 6 ms 27228 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27300 KB Output is correct
10 Correct 6 ms 27304 KB Output is correct
11 Correct 6 ms 27224 KB Output is correct
12 Correct 6 ms 27224 KB Output is correct
13 Correct 7 ms 27740 KB Output is correct
14 Correct 6 ms 27308 KB Output is correct
15 Correct 6 ms 27228 KB Output is correct
16 Correct 6 ms 27228 KB Output is correct
17 Correct 6 ms 27224 KB Output is correct
18 Correct 6 ms 27228 KB Output is correct
19 Correct 6 ms 27228 KB Output is correct
20 Correct 6 ms 27224 KB Output is correct
21 Correct 5 ms 27228 KB Output is correct
22 Correct 6 ms 27308 KB Output is correct
23 Correct 6 ms 27228 KB Output is correct
24 Correct 7 ms 27228 KB Output is correct
25 Correct 7 ms 27740 KB Output is correct
26 Correct 7 ms 27748 KB Output is correct
27 Correct 7 ms 27992 KB Output is correct
28 Correct 7 ms 27740 KB Output is correct
29 Correct 7 ms 27832 KB Output is correct
30 Correct 7 ms 27740 KB Output is correct
31 Correct 8 ms 27740 KB Output is correct
32 Correct 8 ms 27732 KB Output is correct
33 Correct 7 ms 27740 KB Output is correct
34 Correct 7 ms 27740 KB Output is correct
35 Correct 7 ms 27740 KB Output is correct
36 Correct 7 ms 27740 KB Output is correct
37 Correct 7 ms 27996 KB Output is correct
38 Correct 8 ms 28252 KB Output is correct
39 Correct 9 ms 27740 KB Output is correct
40 Correct 8 ms 27600 KB Output is correct
41 Correct 7 ms 27484 KB Output is correct
42 Correct 8 ms 27508 KB Output is correct
43 Correct 7 ms 27484 KB Output is correct
44 Correct 9 ms 27512 KB Output is correct
45 Correct 7 ms 27484 KB Output is correct
46 Correct 7 ms 27484 KB Output is correct
47 Correct 7 ms 27484 KB Output is correct
48 Correct 8 ms 27480 KB Output is correct

Subtask #3
0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27228 KB Output is correct
2 Correct 6 ms 27304 KB Output is correct
3 Correct 7 ms 27740 KB Output is correct
4 Correct 6 ms 27264 KB Output is correct
5 Correct 6 ms 27228 KB Output is correct
6 Correct 6 ms 27264 KB Output is correct
7 Correct 6 ms 27228 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27300 KB Output is correct
10 Correct 6 ms 27304 KB Output is correct
11 Correct 6 ms 27224 KB Output is correct
12 Correct 6 ms 27224 KB Output is correct
13 Correct 7 ms 27740 KB Output is correct
14 Correct 6 ms 27308 KB Output is correct
15 Correct 6 ms 27228 KB Output is correct
16 Correct 6 ms 27228 KB Output is correct
17 Correct 6 ms 27224 KB Output is correct
18 Correct 6 ms 27228 KB Output is correct
19 Correct 6 ms 27228 KB Output is correct
20 Correct 6 ms 27224 KB Output is correct
21 Correct 5 ms 27228 KB Output is correct
22 Correct 6 ms 27308 KB Output is correct
23 Correct 6 ms 27228 KB Output is correct
24 Correct 7 ms 27228 KB Output is correct
25 Correct 7 ms 27740 KB Output is correct
26 Correct 7 ms 27748 KB Output is correct
27 Correct 7 ms 27992 KB Output is correct
28 Correct 7 ms 27740 KB Output is correct
29 Correct 7 ms 27832 KB Output is correct
30 Correct 7 ms 27740 KB Output is correct
31 Correct 8 ms 27740 KB Output is correct
32 Correct 8 ms 27732 KB Output is correct
33 Correct 7 ms 27740 KB Output is correct
34 Correct 7 ms 27740 KB Output is correct
35 Correct 7 ms 27740 KB Output is correct
36 Correct 7 ms 27740 KB Output is correct
37 Correct 7 ms 27996 KB Output is correct
38 Correct 8 ms 28252 KB Output is correct
39 Correct 9 ms 27740 KB Output is correct
40 Correct 8 ms 27600 KB Output is correct
41 Correct 7 ms 27484 KB Output is correct
42 Correct 8 ms 27508 KB Output is correct
43 Correct 7 ms 27484 KB Output is correct
44 Correct 9 ms 27512 KB Output is correct
45 Correct 7 ms 27484 KB Output is correct
46 Correct 7 ms 27484 KB Output is correct
47 Correct 7 ms 27484 KB Output is correct
48 Correct 8 ms 27480 KB Output is correct
49 Correct 382 ms 87272 KB Output is correct
50 Correct 324 ms 92496 KB Output is correct
51 Correct 374 ms 97364 KB Output is correct
52 Correct 358 ms 80752 KB Output is correct
53 Incorrect 276 ms 92964 KB Output isn't correct
54 Halted 0 ms 0 KB -