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Submission #947407

# Submission time Handle Problem Language Result Execution time Memory
947407 2024-03-16T06:36:57 Z Pring Hard route (IZhO17_road) C++17
52 / 100
 298 ms 1372 KB 
#include <bits/stdc++.h>
using namespace std;

#ifdef MIKU
string dbmc = "\033[1;38;2;57;197;187m", dbrs = "\033[0m";
#define debug(x...) cout << dbmc << "[" << #x << "]: ", dout(x)
void dout() { cout << dbrs << endl; }
template <typename T, typename ...U>
void dout(T t, U ...u) { cout << t << (sizeof...(u) ? ", " : ""); dout(u...); }
#else
#define debug(...) 39
#endif

#define int long long
#define fs first
#define sc second
#define mp make_pair
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
typedef pair<int, int> pii;

const int MXN = 5005;
int n;
vector<int> edge[MXN];
pii dp[MXN][2];

struct STACK {
    vector<int> v;
    void init() {
        v.clear();
        v.push_back(0);
    }
    void push(int x) {
        v.push_back(max(v.back(), x));
    }
    void pop() {
        v.pop_back();
    }
    int get() {
        return v.back();
    }
} st;

pii operator+(pii a, pii b) {
    if (a < b) swap(a, b);
    if (a.fs == b.fs) a.sc += b.sc;
    return a;
}

pii &operator+=(pii &a, pii b) {
    return (a = a + b);
}

void push_pii(int id, pii p) {
    if (p > dp[id][0]) {
        dp[id][1] = dp[id][0];
        dp[id][0] = p;
    } else dp[id][1] = max(dp[id][1], p);
}

void DFS_PRE(int id, int par) {
    dp[id][0] = mp(0LL, 0LL);
    dp[id][1] = mp(0LL, 0LL);
    for (auto &i : edge[id]) {
        if (i == par) continue;
        DFS_PRE(i, id);
        push_pii(id, mp(1 + dp[i][0].fs, i));
    }
}

void DFS(int id, int par, int dep, pii &ans) {
    if (edge[id].size() == 1) {
        ans = ans + mp(dep * st.get(), 1LL);
        return;
    }
    st.push(dp[id][1].fs);
    DFS(dp[id][0].sc, id, dep + 1, ans);
    st.pop();
    st.push(dp[id][0].fs);
    for (auto &i : edge[id]) {
        if (i == par) continue;
        if (i == dp[id][0].sc) continue;
        DFS(i, id, dep + 1, ans);
    }
    st.pop();
}

pii solve(int rt) {
    DFS_PRE(rt, 0);
    st.init();
    pii ans = mp(0LL, 0LL);
    for (auto &i : edge[rt]) {
        DFS(i, rt, 1, ans);
    }
    return ans;
}

void miku() {
    int x, y;
    cin >> n;
    FOR(i, 1, n) {
        cin >> x >> y;
        edge[x].push_back(y);
        edge[y].push_back(x);
    }
    pii ans = mp(0LL, 0LL);
    FOR(i, 1, n + 1) {
        if (edge[i].size() >= 2) continue;
        ans = ans + solve(i);
    }
    cout << ans.fs << ' ' << ans.sc / 2 << '\n';
}

int32_t main() {
    cin.tie(0) -> sync_with_stdio(false);
    cin.exceptions(cin.failbit);
    miku();
    return 0;
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 840 KB Output is correct
2 Correct 1 ms 580 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 1 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 1 ms 584 KB Output is correct
14 Correct 1 ms 344 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 584 KB Output is correct
18 Correct 1 ms 344 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 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 840 KB Output is correct
2 Correct 1 ms 580 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 1 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 1 ms 584 KB Output is correct
14 Correct 1 ms 344 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 584 KB Output is correct
18 Correct 1 ms 344 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 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 164 ms 1232 KB Output is correct
26 Correct 166 ms 1116 KB Output is correct
27 Correct 173 ms 1116 KB Output is correct
28 Correct 166 ms 1220 KB Output is correct
29 Correct 215 ms 1116 KB Output is correct
30 Correct 256 ms 1244 KB Output is correct
31 Correct 215 ms 1248 KB Output is correct
32 Correct 223 ms 1116 KB Output is correct
33 Correct 4 ms 1112 KB Output is correct
34 Correct 3 ms 1116 KB Output is correct
35 Correct 3 ms 1356 KB Output is correct
36 Correct 3 ms 1100 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 2 ms 1372 KB Output is correct
39 Correct 4 ms 1116 KB Output is correct
40 Correct 4 ms 860 KB Output is correct
41 Correct 7 ms 856 KB Output is correct
42 Correct 11 ms 848 KB Output is correct
43 Correct 19 ms 860 KB Output is correct
44 Correct 46 ms 1108 KB Output is correct
45 Correct 82 ms 856 KB Output is correct
46 Correct 96 ms 860 KB Output is correct
47 Correct 258 ms 860 KB Output is correct
48 Correct 298 ms 856 KB Output is correct

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 840 KB Output is correct
2 Correct 1 ms 580 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 1 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 1 ms 584 KB Output is correct
14 Correct 1 ms 344 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 584 KB Output is correct
18 Correct 1 ms 344 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 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 164 ms 1232 KB Output is correct
26 Correct 166 ms 1116 KB Output is correct
27 Correct 173 ms 1116 KB Output is correct
28 Correct 166 ms 1220 KB Output is correct
29 Correct 215 ms 1116 KB Output is correct
30 Correct 256 ms 1244 KB Output is correct
31 Correct 215 ms 1248 KB Output is correct
32 Correct 223 ms 1116 KB Output is correct
33 Correct 4 ms 1112 KB Output is correct
34 Correct 3 ms 1116 KB Output is correct
35 Correct 3 ms 1356 KB Output is correct
36 Correct 3 ms 1100 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 2 ms 1372 KB Output is correct
39 Correct 4 ms 1116 KB Output is correct
40 Correct 4 ms 860 KB Output is correct
41 Correct 7 ms 856 KB Output is correct
42 Correct 11 ms 848 KB Output is correct
43 Correct 19 ms 860 KB Output is correct
44 Correct 46 ms 1108 KB Output is correct
45 Correct 82 ms 856 KB Output is correct
46 Correct 96 ms 860 KB Output is correct
47 Correct 258 ms 860 KB Output is correct
48 Correct 298 ms 856 KB Output is correct
49 Runtime error 1 ms 856 KB Execution killed with signal 11
50 Halted 0 ms 0 KB -