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Submission #578794

# Submission time Handle Problem Language Result Execution time Memory
578794 2022-06-18T03:49:33 Z talant117408 Dynamic Diameter (CEOI19_diameter) C++17
24 / 100
 2314 ms 18980 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

#define long                unsigned long 
#define pb                  push_back
#define mp                  make_pair
#define all(v)              (v).begin(),(v).end()
#define rall(v)             (v).rbegin(),(v).rend()
#define lb                  lower_bound
#define ub                  upper_bound
#define sz(v)               int((v).size())
#define do_not_disturb      ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl                '\n'

const int N = 1e5+7;
set <pair <int, ll>> graph[N];
vector <pair <pii, ll>> edges;
ll df, vf;
int n, q;
ll w;

void find_furthest(int v, int p, ll dist = 0) {
    if (dist > df) {
        df = dist;
        vf = v;
    }
    for (auto to : graph[v]) {
        if (to.first == p) continue;
        find_furthest(to.first, v, dist+to.second);
    }
}

void subtask3() {
    for (auto to : edges) {
        if (to.first.first != 1) {
            return;
        }
    }
    set <pair <ll, int>> st;
    for (auto to : edges) {
        st.insert(mp(to.second, to.first.second));
    }
    ll last = 0;
    while (q--) {
        ll d, e;
        cin >> d >> e;
        d = (d + last) % (n - 1);
        e = (e + last) % w;
        auto &c = edges[d].second;
        auto b = edges[d].first.second;
        st.erase(mp(c, b));
        c = e;
        st.insert(mp(c, b));
        ll ans = 0;
        auto endit = st.begin();
        endit++; endit++;
        for (auto it = st.begin(); it != st.end() && it != endit; it++) {
            ans += (*it).first;
        }
        cout << ans << endl;
        last = 0;
    }
    exit(0);
}

void solve() {
    cin >> n >> q >> w;
    for (int i = 0; i < n-1; i++) {
        int a, b;
        ll c;
        cin >> a >> b >> c;
        if (a > b) swap(a, b);
        edges.pb(mp(mp(a, b), c));
        graph[a].insert(mp(b, c));
        graph[b].insert(mp(a, c));
    }
    
    if (n <= 5000) {
        ll last = 0;
        while (q--) {
            ll d, e;
            cin >> d >> e;
            d = (d + last) % (n - 1);
            e = (e + last) % w;
            auto a = edges[d].first.first, b = edges[d].first.second;
            auto &c = edges[d].second;
            graph[a].erase(graph[a].find(mp(b, c)));
            graph[b].erase(graph[b].find(mp(a, c)));
            c = e;
            graph[a].insert(mp(b, c));
            graph[b].insert(mp(a, c));
            df = vf = 0;
            find_furthest(1, 1);
            df = 0;
            find_furthest(vf, vf);
            cout << df << endl;
            last = df;
        }
    }
}

int main() {
    do_not_disturb
    
    int t = 1;
    //~ cin >> t;
    while (t--) {
        solve();
    }
    
    return 0;
}
/*

*/

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5016 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5016 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 229 ms 5412 KB Output is correct
20 Correct 223 ms 5180 KB Output is correct
21 Correct 255 ms 5168 KB Output is correct
22 Correct 295 ms 5320 KB Output is correct
23 Correct 1674 ms 5848 KB Output is correct
24 Correct 1811 ms 5992 KB Output is correct
25 Correct 1919 ms 6036 KB Output is correct
26 Correct 2304 ms 6348 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 21 ms 5076 KB Output is correct
5 Correct 90 ms 5444 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 7 ms 5076 KB Output is correct
9 Correct 31 ms 5092 KB Output is correct
10 Correct 288 ms 5152 KB Output is correct
11 Correct 1418 ms 5680 KB Output is correct
12 Incorrect 5 ms 5716 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 5160 KB Output is correct
2 Correct 259 ms 5172 KB Output is correct
3 Correct 1172 ms 5404 KB Output is correct
4 Correct 2314 ms 5800 KB Output is correct
5 Incorrect 7 ms 6352 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 18980 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5016 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 229 ms 5412 KB Output is correct
20 Correct 223 ms 5180 KB Output is correct
21 Correct 255 ms 5168 KB Output is correct
22 Correct 295 ms 5320 KB Output is correct
23 Correct 1674 ms 5848 KB Output is correct
24 Correct 1811 ms 5992 KB Output is correct
25 Correct 1919 ms 6036 KB Output is correct
26 Correct 2304 ms 6348 KB Output is correct
27 Correct 2 ms 4948 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 4 ms 4948 KB Output is correct
30 Correct 21 ms 5076 KB Output is correct
31 Correct 90 ms 5444 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 3 ms 5076 KB Output is correct
34 Correct 7 ms 5076 KB Output is correct
35 Correct 31 ms 5092 KB Output is correct
36 Correct 288 ms 5152 KB Output is correct
37 Correct 1418 ms 5680 KB Output is correct
38 Incorrect 5 ms 5716 KB Output isn't correct
39 Halted 0 ms 0 KB -