Submission #556304

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
556304	2022-05-02T20:26:53 Z	sidon	Dynamic Diameter (CEOI19_diameter)	C++17	100 / 100	255 ms	52388 KB

diameter

#include <bits/stdc++.h>
using namespace std;
#define int int64_t
 
const int Z = 1e5, INF = 1e18+1;

int n, q, wLim, dfsTimer, e[Z*2], w[Z], sub[Z], L[Z], R[Z];
vector<pair<int, int>> g[Z];

void dfs(int u, int p, int d) {
	L[u] = dfsTimer;
	if(u && size(g[u]) < 2) e[L[u] = dfsTimer++] = d;

	for(auto [v, i] : g[u]) if(v != p) {
		dfs(sub[i] = v, u, d + w[i]);
		e[dfsTimer++] = d;
	}
	R[u] = dfsTimer-1;
}

int sL, sR, sV;
struct SegmentTree {
	int l, r, add {}; array<int, 5> v {};
	SegmentTree *L, *R;
	SegmentTree(int lv, int rv) : l(lv), r(rv) {
		if(r - l > 1) {
			int m = (l + r) / 2;
			L = new SegmentTree(l, m);
			R = new SegmentTree(m, r);
			pull();
		} else
			v = {e[l], -2 * e[l], -INF, -INF, -INF};
	}
	void pull() {
		v = {
			max(L->v[0], R->v[0]) + add,
			max(L->v[1], R->v[1]) - add * 2,
			max(max(L->v[2], R->v[2]), L->v[0] + R->v[1]) - add,
			max(max(L->v[3], R->v[3]), L->v[1] + R->v[0]) - add,
			max(max(L->v[4], R->v[4]), max(L->v[0] + R->v[3], L->v[2] + R->v[0]))
		};
	}
	void rangeAdd(int lv, int rv, int val) {
		sL = lv, sR = rv + 1, sV = val;
		rangeAdd();
	}
	void rangeAdd() {
		if(sL <= l && r <= sR) {
			add += sV;
			v[0] += sV;
			v[1] -= sV * 2;
			v[2] -= sV;
			v[3] -= sV;
			return;
		}
		if(sR <= l || r <= sL) return;
		L->rangeAdd();
		R->rangeAdd();
		pull();
	}
	int query() {
		return max(v[0], v[4]);
	}
};
 
signed main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n >> q >> wLim;
 
	for(int i = 0; i < n - 1; ++i) {
		int u, v;
		cin >> u >> v >> w[i];
		--u, --v;
		g[u].emplace_back(v, i);
		g[v].emplace_back(u, i);
	}

	dfs(0, 0, 0);
	SegmentTree *st = new SegmentTree(0, dfsTimer);

	for(int last {}; q--; ) {
		int qD, qE; cin >> qD >> qE;
		(qD += last) %= n - 1;
		(qE += last) %= wLim;

		st->rangeAdd(L[sub[qD]], R[sub[qD]], qE - w[qD]);
		w[qD] = qE;

		cout << (last = st->query()) << '\n';
	}
}

Subtask #1
11.0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	2 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2680 KB	Output is correct
8	Correct	2 ms	2676 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	3 ms	2684 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2680 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2644 KB	Output is correct
15	Correct	2 ms	2764 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	2 ms	2644 KB	Output is correct
18	Correct	2 ms	2684 KB	Output is correct

Subtask #2
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	2 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2680 KB	Output is correct
8	Correct	2 ms	2676 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	3 ms	2684 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2680 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2644 KB	Output is correct
15	Correct	2 ms	2764 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	2 ms	2644 KB	Output is correct
18	Correct	2 ms	2684 KB	Output is correct
19	Correct	4 ms	3156 KB	Output is correct
20	Correct	6 ms	3028 KB	Output is correct
21	Correct	5 ms	3028 KB	Output is correct
22	Correct	5 ms	3028 KB	Output is correct
23	Correct	10 ms	4736 KB	Output is correct
24	Correct	8 ms	4564 KB	Output is correct
25	Correct	7 ms	4660 KB	Output is correct
26	Correct	9 ms	4484 KB	Output is correct

Subtask #3
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2680 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	8 ms	2920 KB	Output is correct
5	Correct	32 ms	3788 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2944 KB	Output is correct
8	Correct	2 ms	2900 KB	Output is correct
9	Correct	4 ms	2900 KB	Output is correct
10	Correct	9 ms	3156 KB	Output is correct
11	Correct	42 ms	4196 KB	Output is correct
12	Correct	5 ms	5076 KB	Output is correct
13	Correct	5 ms	5076 KB	Output is correct
14	Correct	5 ms	5076 KB	Output is correct
15	Correct	16 ms	5396 KB	Output is correct
16	Correct	52 ms	6556 KB	Output is correct
17	Correct	54 ms	50816 KB	Output is correct
18	Correct	54 ms	50776 KB	Output is correct
19	Correct	55 ms	50760 KB	Output is correct
20	Correct	82 ms	51056 KB	Output is correct
21	Correct	178 ms	52388 KB	Output is correct

Subtask #4
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	3028 KB	Output is correct
2	Correct	7 ms	3196 KB	Output is correct
3	Correct	24 ms	3664 KB	Output is correct
4	Correct	47 ms	4424 KB	Output is correct
5	Correct	9 ms	6612 KB	Output is correct
6	Correct	14 ms	6788 KB	Output is correct
7	Correct	36 ms	7324 KB	Output is correct
8	Correct	72 ms	8088 KB	Output is correct
9	Correct	31 ms	22432 KB	Output is correct
10	Correct	45 ms	22552 KB	Output is correct
11	Correct	84 ms	23212 KB	Output is correct
12	Correct	118 ms	24164 KB	Output is correct
13	Correct	56 ms	42204 KB	Output is correct
14	Correct	68 ms	42280 KB	Output is correct
15	Correct	114 ms	42964 KB	Output is correct
16	Correct	155 ms	43856 KB	Output is correct
17	Correct	164 ms	43524 KB	Output is correct

Subtask #5
24.0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	229 ms	44512 KB	Output is correct
2	Correct	242 ms	44344 KB	Output is correct
3	Correct	229 ms	44516 KB	Output is correct
4	Correct	232 ms	44492 KB	Output is correct
5	Correct	213 ms	45384 KB	Output is correct
6	Correct	214 ms	49804 KB	Output is correct
7	Correct	236 ms	45236 KB	Output is correct
8	Correct	236 ms	45140 KB	Output is correct
9	Correct	237 ms	45124 KB	Output is correct
10	Correct	235 ms	45328 KB	Output is correct
11	Correct	234 ms	46116 KB	Output is correct
12	Correct	245 ms	49980 KB	Output is correct
13	Correct	215 ms	42276 KB	Output is correct
14	Correct	233 ms	42472 KB	Output is correct
15	Correct	233 ms	42368 KB	Output is correct
16	Correct	217 ms	42524 KB	Output is correct
17	Correct	236 ms	43692 KB	Output is correct
18	Correct	213 ms	48804 KB	Output is correct
19	Correct	214 ms	42456 KB	Output is correct
20	Correct	242 ms	42284 KB	Output is correct
21	Correct	218 ms	42404 KB	Output is correct
22	Correct	225 ms	42512 KB	Output is correct
23	Correct	238 ms	43700 KB	Output is correct
24	Correct	217 ms	48832 KB	Output is correct

Subtask #6
27.0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	2 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2680 KB	Output is correct
8	Correct	2 ms	2676 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	3 ms	2684 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2680 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2644 KB	Output is correct
15	Correct	2 ms	2764 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	2 ms	2644 KB	Output is correct
18	Correct	2 ms	2684 KB	Output is correct
19	Correct	4 ms	3156 KB	Output is correct
20	Correct	6 ms	3028 KB	Output is correct
21	Correct	5 ms	3028 KB	Output is correct
22	Correct	5 ms	3028 KB	Output is correct
23	Correct	10 ms	4736 KB	Output is correct
24	Correct	8 ms	4564 KB	Output is correct
25	Correct	7 ms	4660 KB	Output is correct
26	Correct	9 ms	4484 KB	Output is correct
27	Correct	2 ms	2644 KB	Output is correct
28	Correct	2 ms	2680 KB	Output is correct
29	Correct	2 ms	2644 KB	Output is correct
30	Correct	8 ms	2920 KB	Output is correct
31	Correct	32 ms	3788 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	2 ms	2944 KB	Output is correct
34	Correct	2 ms	2900 KB	Output is correct
35	Correct	4 ms	2900 KB	Output is correct
36	Correct	9 ms	3156 KB	Output is correct
37	Correct	42 ms	4196 KB	Output is correct
38	Correct	5 ms	5076 KB	Output is correct
39	Correct	5 ms	5076 KB	Output is correct
40	Correct	5 ms	5076 KB	Output is correct
41	Correct	16 ms	5396 KB	Output is correct
42	Correct	52 ms	6556 KB	Output is correct
43	Correct	54 ms	50816 KB	Output is correct
44	Correct	54 ms	50776 KB	Output is correct
45	Correct	55 ms	50760 KB	Output is correct
46	Correct	82 ms	51056 KB	Output is correct
47	Correct	178 ms	52388 KB	Output is correct
48	Correct	3 ms	3028 KB	Output is correct
49	Correct	7 ms	3196 KB	Output is correct
50	Correct	24 ms	3664 KB	Output is correct
51	Correct	47 ms	4424 KB	Output is correct
52	Correct	9 ms	6612 KB	Output is correct
53	Correct	14 ms	6788 KB	Output is correct
54	Correct	36 ms	7324 KB	Output is correct
55	Correct	72 ms	8088 KB	Output is correct
56	Correct	31 ms	22432 KB	Output is correct
57	Correct	45 ms	22552 KB	Output is correct
58	Correct	84 ms	23212 KB	Output is correct
59	Correct	118 ms	24164 KB	Output is correct
60	Correct	56 ms	42204 KB	Output is correct
61	Correct	68 ms	42280 KB	Output is correct
62	Correct	114 ms	42964 KB	Output is correct
63	Correct	155 ms	43856 KB	Output is correct
64	Correct	164 ms	43524 KB	Output is correct
65	Correct	229 ms	44512 KB	Output is correct
66	Correct	242 ms	44344 KB	Output is correct
67	Correct	229 ms	44516 KB	Output is correct
68	Correct	232 ms	44492 KB	Output is correct
69	Correct	213 ms	45384 KB	Output is correct
70	Correct	214 ms	49804 KB	Output is correct
71	Correct	236 ms	45236 KB	Output is correct
72	Correct	236 ms	45140 KB	Output is correct
73	Correct	237 ms	45124 KB	Output is correct
74	Correct	235 ms	45328 KB	Output is correct
75	Correct	234 ms	46116 KB	Output is correct
76	Correct	245 ms	49980 KB	Output is correct
77	Correct	215 ms	42276 KB	Output is correct
78	Correct	233 ms	42472 KB	Output is correct
79	Correct	233 ms	42368 KB	Output is correct
80	Correct	217 ms	42524 KB	Output is correct
81	Correct	236 ms	43692 KB	Output is correct
82	Correct	213 ms	48804 KB	Output is correct
83	Correct	214 ms	42456 KB	Output is correct
84	Correct	242 ms	42284 KB	Output is correct
85	Correct	218 ms	42404 KB	Output is correct
86	Correct	225 ms	42512 KB	Output is correct
87	Correct	238 ms	43700 KB	Output is correct
88	Correct	217 ms	48832 KB	Output is correct
89	Correct	221 ms	43388 KB	Output is correct
90	Correct	229 ms	43580 KB	Output is correct
91	Correct	237 ms	44056 KB	Output is correct
92	Correct	238 ms	43284 KB	Output is correct
93	Correct	236 ms	44160 KB	Output is correct
94	Correct	220 ms	41676 KB	Output is correct
95	Correct	214 ms	39820 KB	Output is correct
96	Correct	195 ms	38812 KB	Output is correct
97	Correct	227 ms	39600 KB	Output is correct
98	Correct	186 ms	41500 KB	Output is correct
99	Correct	196 ms	39472 KB	Output is correct
100	Correct	255 ms	39368 KB	Output is correct

Submission #556304

Compilation message

Subtask #1 11.0 / 11.0

Subtask #2 13.0 / 13.0

Subtask #3 7.0 / 7.0

Subtask #4 18.0 / 18.0

Subtask #5 24.0 / 24.0

Subtask #6 27.0 / 27.0

Subtask #1
11.0 / 11.0

Subtask #2
13.0 / 13.0

Subtask #3
7.0 / 7.0

Subtask #4
18.0 / 18.0

Subtask #5
24.0 / 24.0

Subtask #6
27.0 / 27.0