oj.uz

Submission #917755

# Submission time Handle Problem Language Result Execution time Memory
917755 2024-01-28T17:30:21 Z NK_ Dynamic Diameter (CEOI19_diameter) C++17
49 / 100
 217 ms 39376 KB 
// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>

using namespace std;

#define nl '\n'
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define sz(x) int(x.size())

using ll = long long;
const ll INF = 7e18 + 10;

template<class T> using V = vector<T>;
using vi = V<int>;
using pi = pair<int, int>;
using vpi = V<pi>;
using vl = V<ll>;

struct T {
	ll a, b, c, ab, bc, abc;

	T() { a = b = c = ab = bc = abc = -INF; }
	T(int x) {
		a = x, b = -2 * x, c = x, ab = -x, bc = -x, abc = 0;
	}

	void upd(int d) {
		a += d, b -= 2 * d, c += d, ab -= d, bc -= d;
	}

};

struct Seg {
	const T ID = T(); T comb(T a, T b) {
		T c = T(); 
		c.a = max(a.a, b.a), c.b = max(a.b, b.b), c.c = max(a.c, b.c);
		c.ab = max({a.ab, b.ab, a.a + b.b}), c.bc = max({a.bc, b.bc, a.b + b.c});
		c.abc = max({a.abc, b.abc, a.ab + b.c, a.a + b.bc});
		return c;
	};

	V<T> seg; vl lazy; int N; void init(int n) {
		for(N = 1; N < n; ) N *= 2;
		seg.assign(2 * N, ID); lazy.assign(2 * N, 0);
	}

	void push(int x, int L, int R) {
		seg[x].upd(lazy[x]);
		if (L != R) for(int i = 0; i < 2; i++) lazy[2*x+i] += lazy[x];
		lazy[x] = 0;
	}

	void set(int p, T x) {
		seg[p += N] = x; for(p /= 2; p; p /= 2) pull(p);
	}

	void pull(int x) { seg[x] = comb(seg[2*x], seg[2*x+1]); }

	void upd(int l, int r, ll v, int x, int L, int R) {
		push(x, L, R); if (r < L || R < l) return;
		if (l <= L && R <= r) {
			lazy[x] += v; push(x, L, R); return;
		}

		int M = (L + R) / 2;
		upd(l, r, v, 2 * x, L, M);
		upd(l, r, v, 2 * x + 1, M + 1, R);
		pull(x);
	}

	void upd(int l, int r, ll v) { upd(l, r, v, 1, 0, N - 1); }
};


int main() {
	cin.tie(0)->sync_with_stdio(0);
	
	int N, M; ll MXW; cin >> N >> M >> MXW;

	V<vpi> adj(N); vi E(N - 1); vl W(N);

	for(int i = 0; i < N - 1; i++) {
		int u, v; cin >> u >> v >> W[i]; --u, --v;
		adj[u].pb(mp(v, i));
		adj[v].pb(mp(u, i));
	}
	
	Seg S; S.init(2*N); vi st(N), en(N);

	vi ord; int t = 0; ll dep = 0;
	function<void(int, int)> dfs = [&](int u, int p) {
		st[u] = en[u] = t; S.set(t, T(dep)); ord.pb(u); t++;

		for(auto& e : adj[u]) {
			int v, i; tie(v, i) = e;
			if (v == p) continue;

			dep += W[i];
			E[i] = v; dfs(v, u);
			dep -= W[i];

			S.set(t, T(dep)); en[u] = t; ord.pb(u); t++; 
		}

	};

	dfs(0, -1);

	// for(int i = 0; i < N; i++) {
	// 	cout << i << " => " << st[i] << " " << en[i] << endl;
	// }

	// for(auto& x : ord) {
	// 	cout << x << " ";
	// }
	// cout << endl;

	// cout << S.seg[1].abc << endl;


	ll last = 0;
	for(int i = 0; i < M; i++) {
		ll e, w; cin >> e >> w;

		e = ll(e + last) % ll(N - 1);
		w = ll(w + last) % MXW;

		// cout << e << " " << w << endl;

		int u = E[e];
		S.upd(st[u], en[u], w - W[e]);
		W[e] = w;

		last = S.seg[1].abc;
		cout << last << nl;
	}

	exit(0-0);
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 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 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 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 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 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 5 ms 604 KB Output is correct
20 Correct 4 ms 604 KB Output is correct
21 Correct 4 ms 604 KB Output is correct
22 Correct 4 ms 860 KB Output is correct
23 Correct 9 ms 2652 KB Output is correct
24 Correct 10 ms 2652 KB Output is correct
25 Correct 10 ms 2648 KB Output is correct
26 Correct 8 ms 3164 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 6 ms 504 KB Output is correct
5 Correct 38 ms 848 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 8 ms 604 KB Output is correct
11 Correct 40 ms 856 KB Output is correct
12 Correct 3 ms 2652 KB Output is correct
13 Correct 4 ms 2740 KB Output is correct
14 Correct 5 ms 2904 KB Output is correct
15 Correct 14 ms 2652 KB Output is correct
16 Correct 63 ms 3052 KB Output is correct
17 Correct 62 ms 38900 KB Output is correct
18 Correct 68 ms 38796 KB Output is correct
19 Correct 65 ms 38852 KB Output is correct
20 Correct 88 ms 38852 KB Output is correct
21 Correct 165 ms 38816 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 6 ms 856 KB Output is correct
3 Correct 25 ms 856 KB Output is correct
4 Correct 54 ms 1108 KB Output is correct
5 Correct 8 ms 4956 KB Output is correct
6 Correct 14 ms 4952 KB Output is correct
7 Correct 39 ms 5212 KB Output is correct
8 Correct 76 ms 5584 KB Output is correct
9 Correct 39 ms 19416 KB Output is correct
10 Correct 44 ms 19416 KB Output is correct
11 Correct 78 ms 19764 KB Output is correct
12 Correct 119 ms 19924 KB Output is correct
13 Correct 76 ms 38364 KB Output is correct
14 Correct 80 ms 38348 KB Output is correct
15 Correct 114 ms 38600 KB Output is correct
16 Correct 185 ms 38884 KB Output is correct
17 Correct 169 ms 39376 KB Output is correct

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 217 ms 39112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 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 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 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 5 ms 604 KB Output is correct
20 Correct 4 ms 604 KB Output is correct
21 Correct 4 ms 604 KB Output is correct
22 Correct 4 ms 860 KB Output is correct
23 Correct 9 ms 2652 KB Output is correct
24 Correct 10 ms 2652 KB Output is correct
25 Correct 10 ms 2648 KB Output is correct
26 Correct 8 ms 3164 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 6 ms 504 KB Output is correct
31 Correct 38 ms 848 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 8 ms 604 KB Output is correct
37 Correct 40 ms 856 KB Output is correct
38 Correct 3 ms 2652 KB Output is correct
39 Correct 4 ms 2740 KB Output is correct
40 Correct 5 ms 2904 KB Output is correct
41 Correct 14 ms 2652 KB Output is correct
42 Correct 63 ms 3052 KB Output is correct
43 Correct 62 ms 38900 KB Output is correct
44 Correct 68 ms 38796 KB Output is correct
45 Correct 65 ms 38852 KB Output is correct
46 Correct 88 ms 38852 KB Output is correct
47 Correct 165 ms 38816 KB Output is correct
48 Correct 1 ms 856 KB Output is correct
49 Correct 6 ms 856 KB Output is correct
50 Correct 25 ms 856 KB Output is correct
51 Correct 54 ms 1108 KB Output is correct
52 Correct 8 ms 4956 KB Output is correct
53 Correct 14 ms 4952 KB Output is correct
54 Correct 39 ms 5212 KB Output is correct
55 Correct 76 ms 5584 KB Output is correct
56 Correct 39 ms 19416 KB Output is correct
57 Correct 44 ms 19416 KB Output is correct
58 Correct 78 ms 19764 KB Output is correct
59 Correct 119 ms 19924 KB Output is correct
60 Correct 76 ms 38364 KB Output is correct
61 Correct 80 ms 38348 KB Output is correct
62 Correct 114 ms 38600 KB Output is correct
63 Correct 185 ms 38884 KB Output is correct
64 Correct 169 ms 39376 KB Output is correct
65 Incorrect 217 ms 39112 KB Output isn't correct
66 Halted 0 ms 0 KB -