#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 0x3f3f3f3f;
struct node
{
int Mi, Mj, Mk, Mij, Mjk, Mijk;
int lz;
node(int I = 0, int J = 0, int K = 0, int IJ = 0, int JK = 0, int IJK = 0, int LZ = 0) : Mi(I), Mj(J), Mk(K), Mij(IJ), Mjk(JK), Mijk(IJK), lz(LZ) {}
node operator+(node outro)
{
node resp;
resp.Mi = resp.Mk = max(Mi, outro.Mi);
resp.Mj = min(Mj, outro.Mj);
resp.Mij = max({Mij, Mi - 2*outro.Mj, outro.Mij});
resp.Mjk = max({Mjk, -2*Mj + outro.Mk, outro.Mjk});
resp.Mijk = max({Mijk, Mij + outro.Mk, Mi + outro.Mjk, outro.Mijk});
return resp;
}
};
const int MAXN = 2e5 + 10;
array<node, 4*MAXN> seg;
array<vector<pair<int, int>>, MAXN> grafo;
array<int, MAXN> peso, idIn, idOut;
int temp = 0;
void refresh(int pos, int ini, int fim)
{
if (seg[pos].lz == 0) return;
int x = seg[pos].lz; seg[pos].lz = 0;
seg[pos].Mi += x; seg[pos].Mj += x; seg[pos].Mk += x;
seg[pos].Mij -= x; seg[pos].Mjk -= x;
seg[pos].Mijk += 0;
if (ini == fim) return;
int e = 2*pos; int d = 2*pos + 1;
seg[e].lz += x;
seg[d].lz += x;
}
void update(int pos, int ini, int fim, int p, int q, int val)
{
refresh(pos, ini, fim);
if (q < ini || p > fim) return;
if (p <= ini && fim <= q)
{
seg[pos].lz += val;
refresh(pos, ini, fim);
return;
}
int m = (ini + fim) >> 1;
int e = 2*pos; int d = 2*pos + 1;
update(e, ini, m, p, q, val);
update(d, m+1, fim, p, q, val);
seg[pos] = seg[e] + seg[d];
}
node query(int pos, int ini, int fim, int p, int q)
{
refresh(pos, ini, fim);
if (q < ini || p > fim) return node(-INF, INF, -INF, -INF, -INF, -INF);
if (p <= ini && fim <= q) return seg[pos];
int m = (ini + fim) >> 1;
int e = 2*pos; int d = 2*pos + 1;
return (query(e, ini, m, p, q) + query(d, m+1, fim, p, q));
}
void dfs(int v, int p, int paiEdge)
{
++temp;
if (paiEdge != -1) idIn[paiEdge] = temp;
for (auto [viz, e] : grafo[v])
{
if (viz == p) continue;
dfs(viz, v, e);
}
++temp;
if (paiEdge != -1) idOut[paiEdge] = temp;
}
int32_t main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int N, Q, W;
cin >> N >> Q >> W;
for (int i = 1; i < N; i++)
{
int X, Y, P;
cin >> X >> Y >> P;
grafo[X].emplace_back(Y, i);
grafo[Y].emplace_back(X, i);
peso[i] = P;
}
dfs(1, 1, -1);
--temp;
for (int i = 1; i < N; i++) update(1, 1, temp, idIn[i], idOut[i]-1, peso[i]);
// node aux = query(1, 1, temp, 1, temp);
// cerr << aux.Mi << " " << aux.Mj << " " << aux.Mk << " " << aux.Mij << " " << aux.Mjk << " " << aux.Mijk << '\n';
int last = 0;
while (Q--)
{
int D, E;
cin >> D >> E;
D = (D + last) % (N - 1); ++D;
E = (E + last) % W;
update(1, 1, temp, idIn[D], idOut[D]-1, E - peso[D]);
peso[D] = E;
last = query(1, 1, temp, 1, temp).Mijk;
cout << last << '\n';
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
48852 KB |
Output is correct |
2 |
Correct |
17 ms |
48852 KB |
Output is correct |
3 |
Correct |
18 ms |
48764 KB |
Output is correct |
4 |
Correct |
21 ms |
48796 KB |
Output is correct |
5 |
Correct |
17 ms |
48816 KB |
Output is correct |
6 |
Correct |
17 ms |
48776 KB |
Output is correct |
7 |
Correct |
19 ms |
48836 KB |
Output is correct |
8 |
Correct |
18 ms |
48760 KB |
Output is correct |
9 |
Correct |
17 ms |
48860 KB |
Output is correct |
10 |
Correct |
18 ms |
48844 KB |
Output is correct |
11 |
Correct |
18 ms |
48852 KB |
Output is correct |
12 |
Correct |
17 ms |
48860 KB |
Output is correct |
13 |
Correct |
18 ms |
48856 KB |
Output is correct |
14 |
Correct |
18 ms |
48852 KB |
Output is correct |
15 |
Correct |
18 ms |
48852 KB |
Output is correct |
16 |
Correct |
18 ms |
48764 KB |
Output is correct |
17 |
Correct |
18 ms |
48852 KB |
Output is correct |
18 |
Correct |
18 ms |
48812 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
48852 KB |
Output is correct |
2 |
Correct |
17 ms |
48852 KB |
Output is correct |
3 |
Correct |
18 ms |
48764 KB |
Output is correct |
4 |
Correct |
21 ms |
48796 KB |
Output is correct |
5 |
Correct |
17 ms |
48816 KB |
Output is correct |
6 |
Correct |
17 ms |
48776 KB |
Output is correct |
7 |
Correct |
19 ms |
48836 KB |
Output is correct |
8 |
Correct |
18 ms |
48760 KB |
Output is correct |
9 |
Correct |
17 ms |
48860 KB |
Output is correct |
10 |
Correct |
18 ms |
48844 KB |
Output is correct |
11 |
Correct |
18 ms |
48852 KB |
Output is correct |
12 |
Correct |
17 ms |
48860 KB |
Output is correct |
13 |
Correct |
18 ms |
48856 KB |
Output is correct |
14 |
Correct |
18 ms |
48852 KB |
Output is correct |
15 |
Correct |
18 ms |
48852 KB |
Output is correct |
16 |
Correct |
18 ms |
48764 KB |
Output is correct |
17 |
Correct |
18 ms |
48852 KB |
Output is correct |
18 |
Correct |
18 ms |
48812 KB |
Output is correct |
19 |
Correct |
20 ms |
48940 KB |
Output is correct |
20 |
Correct |
21 ms |
48952 KB |
Output is correct |
21 |
Correct |
21 ms |
48996 KB |
Output is correct |
22 |
Correct |
21 ms |
48988 KB |
Output is correct |
23 |
Correct |
27 ms |
49316 KB |
Output is correct |
24 |
Correct |
24 ms |
49356 KB |
Output is correct |
25 |
Correct |
25 ms |
49436 KB |
Output is correct |
26 |
Correct |
27 ms |
49652 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
18 ms |
48836 KB |
Output is correct |
2 |
Correct |
18 ms |
48832 KB |
Output is correct |
3 |
Correct |
17 ms |
48864 KB |
Output is correct |
4 |
Correct |
23 ms |
49108 KB |
Output is correct |
5 |
Correct |
46 ms |
49796 KB |
Output is correct |
6 |
Correct |
18 ms |
48852 KB |
Output is correct |
7 |
Correct |
18 ms |
48852 KB |
Output is correct |
8 |
Correct |
19 ms |
48852 KB |
Output is correct |
9 |
Correct |
19 ms |
48844 KB |
Output is correct |
10 |
Correct |
28 ms |
49144 KB |
Output is correct |
11 |
Correct |
53 ms |
49796 KB |
Output is correct |
12 |
Correct |
20 ms |
49236 KB |
Output is correct |
13 |
Correct |
20 ms |
49236 KB |
Output is correct |
14 |
Correct |
21 ms |
49260 KB |
Output is correct |
15 |
Correct |
33 ms |
49512 KB |
Output is correct |
16 |
Correct |
63 ms |
50168 KB |
Output is correct |
17 |
Correct |
65 ms |
56324 KB |
Output is correct |
18 |
Correct |
68 ms |
56472 KB |
Output is correct |
19 |
Correct |
66 ms |
56412 KB |
Output is correct |
20 |
Correct |
77 ms |
56648 KB |
Output is correct |
21 |
Correct |
131 ms |
57064 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
48908 KB |
Output is correct |
2 |
Correct |
23 ms |
49064 KB |
Output is correct |
3 |
Correct |
43 ms |
49524 KB |
Output is correct |
4 |
Correct |
67 ms |
50096 KB |
Output is correct |
5 |
Correct |
26 ms |
49800 KB |
Output is correct |
6 |
Correct |
31 ms |
49872 KB |
Output is correct |
7 |
Correct |
56 ms |
50452 KB |
Output is correct |
8 |
Correct |
94 ms |
50872 KB |
Output is correct |
9 |
Correct |
50 ms |
53024 KB |
Output is correct |
10 |
Correct |
58 ms |
53072 KB |
Output is correct |
11 |
Correct |
86 ms |
53316 KB |
Output is correct |
12 |
Correct |
129 ms |
53288 KB |
Output is correct |
13 |
Correct |
84 ms |
56664 KB |
Output is correct |
14 |
Correct |
93 ms |
56712 KB |
Output is correct |
15 |
Correct |
127 ms |
56876 KB |
Output is correct |
16 |
Correct |
181 ms |
57216 KB |
Output is correct |
17 |
Correct |
144 ms |
57212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
233 ms |
57952 KB |
Output is correct |
2 |
Correct |
223 ms |
57956 KB |
Output is correct |
3 |
Correct |
219 ms |
57932 KB |
Output is correct |
4 |
Correct |
220 ms |
57844 KB |
Output is correct |
5 |
Correct |
209 ms |
57740 KB |
Output is correct |
6 |
Correct |
176 ms |
57544 KB |
Output is correct |
7 |
Correct |
255 ms |
59728 KB |
Output is correct |
8 |
Correct |
267 ms |
59900 KB |
Output is correct |
9 |
Correct |
263 ms |
59732 KB |
Output is correct |
10 |
Correct |
254 ms |
59724 KB |
Output is correct |
11 |
Correct |
299 ms |
59628 KB |
Output is correct |
12 |
Correct |
214 ms |
58800 KB |
Output is correct |
13 |
Correct |
369 ms |
62564 KB |
Output is correct |
14 |
Correct |
308 ms |
62648 KB |
Output is correct |
15 |
Correct |
333 ms |
62556 KB |
Output is correct |
16 |
Correct |
338 ms |
62564 KB |
Output is correct |
17 |
Correct |
365 ms |
62120 KB |
Output is correct |
18 |
Correct |
263 ms |
59892 KB |
Output is correct |
19 |
Correct |
310 ms |
62552 KB |
Output is correct |
20 |
Correct |
304 ms |
62536 KB |
Output is correct |
21 |
Correct |
345 ms |
62640 KB |
Output is correct |
22 |
Correct |
346 ms |
62508 KB |
Output is correct |
23 |
Correct |
299 ms |
62128 KB |
Output is correct |
24 |
Correct |
273 ms |
59912 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
48852 KB |
Output is correct |
2 |
Correct |
17 ms |
48852 KB |
Output is correct |
3 |
Correct |
18 ms |
48764 KB |
Output is correct |
4 |
Correct |
21 ms |
48796 KB |
Output is correct |
5 |
Correct |
17 ms |
48816 KB |
Output is correct |
6 |
Correct |
17 ms |
48776 KB |
Output is correct |
7 |
Correct |
19 ms |
48836 KB |
Output is correct |
8 |
Correct |
18 ms |
48760 KB |
Output is correct |
9 |
Correct |
17 ms |
48860 KB |
Output is correct |
10 |
Correct |
18 ms |
48844 KB |
Output is correct |
11 |
Correct |
18 ms |
48852 KB |
Output is correct |
12 |
Correct |
17 ms |
48860 KB |
Output is correct |
13 |
Correct |
18 ms |
48856 KB |
Output is correct |
14 |
Correct |
18 ms |
48852 KB |
Output is correct |
15 |
Correct |
18 ms |
48852 KB |
Output is correct |
16 |
Correct |
18 ms |
48764 KB |
Output is correct |
17 |
Correct |
18 ms |
48852 KB |
Output is correct |
18 |
Correct |
18 ms |
48812 KB |
Output is correct |
19 |
Correct |
20 ms |
48940 KB |
Output is correct |
20 |
Correct |
21 ms |
48952 KB |
Output is correct |
21 |
Correct |
21 ms |
48996 KB |
Output is correct |
22 |
Correct |
21 ms |
48988 KB |
Output is correct |
23 |
Correct |
27 ms |
49316 KB |
Output is correct |
24 |
Correct |
24 ms |
49356 KB |
Output is correct |
25 |
Correct |
25 ms |
49436 KB |
Output is correct |
26 |
Correct |
27 ms |
49652 KB |
Output is correct |
27 |
Correct |
18 ms |
48836 KB |
Output is correct |
28 |
Correct |
18 ms |
48832 KB |
Output is correct |
29 |
Correct |
17 ms |
48864 KB |
Output is correct |
30 |
Correct |
23 ms |
49108 KB |
Output is correct |
31 |
Correct |
46 ms |
49796 KB |
Output is correct |
32 |
Correct |
18 ms |
48852 KB |
Output is correct |
33 |
Correct |
18 ms |
48852 KB |
Output is correct |
34 |
Correct |
19 ms |
48852 KB |
Output is correct |
35 |
Correct |
19 ms |
48844 KB |
Output is correct |
36 |
Correct |
28 ms |
49144 KB |
Output is correct |
37 |
Correct |
53 ms |
49796 KB |
Output is correct |
38 |
Correct |
20 ms |
49236 KB |
Output is correct |
39 |
Correct |
20 ms |
49236 KB |
Output is correct |
40 |
Correct |
21 ms |
49260 KB |
Output is correct |
41 |
Correct |
33 ms |
49512 KB |
Output is correct |
42 |
Correct |
63 ms |
50168 KB |
Output is correct |
43 |
Correct |
65 ms |
56324 KB |
Output is correct |
44 |
Correct |
68 ms |
56472 KB |
Output is correct |
45 |
Correct |
66 ms |
56412 KB |
Output is correct |
46 |
Correct |
77 ms |
56648 KB |
Output is correct |
47 |
Correct |
131 ms |
57064 KB |
Output is correct |
48 |
Correct |
19 ms |
48908 KB |
Output is correct |
49 |
Correct |
23 ms |
49064 KB |
Output is correct |
50 |
Correct |
43 ms |
49524 KB |
Output is correct |
51 |
Correct |
67 ms |
50096 KB |
Output is correct |
52 |
Correct |
26 ms |
49800 KB |
Output is correct |
53 |
Correct |
31 ms |
49872 KB |
Output is correct |
54 |
Correct |
56 ms |
50452 KB |
Output is correct |
55 |
Correct |
94 ms |
50872 KB |
Output is correct |
56 |
Correct |
50 ms |
53024 KB |
Output is correct |
57 |
Correct |
58 ms |
53072 KB |
Output is correct |
58 |
Correct |
86 ms |
53316 KB |
Output is correct |
59 |
Correct |
129 ms |
53288 KB |
Output is correct |
60 |
Correct |
84 ms |
56664 KB |
Output is correct |
61 |
Correct |
93 ms |
56712 KB |
Output is correct |
62 |
Correct |
127 ms |
56876 KB |
Output is correct |
63 |
Correct |
181 ms |
57216 KB |
Output is correct |
64 |
Correct |
144 ms |
57212 KB |
Output is correct |
65 |
Correct |
233 ms |
57952 KB |
Output is correct |
66 |
Correct |
223 ms |
57956 KB |
Output is correct |
67 |
Correct |
219 ms |
57932 KB |
Output is correct |
68 |
Correct |
220 ms |
57844 KB |
Output is correct |
69 |
Correct |
209 ms |
57740 KB |
Output is correct |
70 |
Correct |
176 ms |
57544 KB |
Output is correct |
71 |
Correct |
255 ms |
59728 KB |
Output is correct |
72 |
Correct |
267 ms |
59900 KB |
Output is correct |
73 |
Correct |
263 ms |
59732 KB |
Output is correct |
74 |
Correct |
254 ms |
59724 KB |
Output is correct |
75 |
Correct |
299 ms |
59628 KB |
Output is correct |
76 |
Correct |
214 ms |
58800 KB |
Output is correct |
77 |
Correct |
369 ms |
62564 KB |
Output is correct |
78 |
Correct |
308 ms |
62648 KB |
Output is correct |
79 |
Correct |
333 ms |
62556 KB |
Output is correct |
80 |
Correct |
338 ms |
62564 KB |
Output is correct |
81 |
Correct |
365 ms |
62120 KB |
Output is correct |
82 |
Correct |
263 ms |
59892 KB |
Output is correct |
83 |
Correct |
310 ms |
62552 KB |
Output is correct |
84 |
Correct |
304 ms |
62536 KB |
Output is correct |
85 |
Correct |
345 ms |
62640 KB |
Output is correct |
86 |
Correct |
346 ms |
62508 KB |
Output is correct |
87 |
Correct |
299 ms |
62128 KB |
Output is correct |
88 |
Correct |
273 ms |
59912 KB |
Output is correct |
89 |
Correct |
208 ms |
57604 KB |
Output is correct |
90 |
Correct |
221 ms |
57804 KB |
Output is correct |
91 |
Correct |
268 ms |
58908 KB |
Output is correct |
92 |
Correct |
250 ms |
58864 KB |
Output is correct |
93 |
Correct |
305 ms |
60684 KB |
Output is correct |
94 |
Correct |
347 ms |
60072 KB |
Output is correct |
95 |
Correct |
378 ms |
61124 KB |
Output is correct |
96 |
Correct |
292 ms |
60372 KB |
Output is correct |
97 |
Correct |
330 ms |
61068 KB |
Output is correct |
98 |
Correct |
361 ms |
62396 KB |
Output is correct |
99 |
Correct |
328 ms |
60812 KB |
Output is correct |
100 |
Correct |
329 ms |
60892 KB |
Output is correct |