// BEGIN BOILERPLATE CODE
#include <bits/stdc++.h>
using namespace std;
#ifdef KAMIRULEZ
const bool kami_loc = true;
const long long kami_seed = 69420;
#else
const bool kami_loc = false;
const long long kami_seed = chrono::steady_clock::now().time_since_epoch().count();
#endif
const string kami_fi = "kamirulez.inp";
const string kami_fo = "kamirulez.out";
mt19937_64 kami_gen(kami_seed);
long long rand_range(long long rmin, long long rmax) {
uniform_int_distribution<long long> rdist(rmin, rmax);
return rdist(kami_gen);
}
long double rand_real(long double rmin, long double rmax) {
uniform_real_distribution<long double> rdist(rmin, rmax);
return rdist(kami_gen);
}
void file_io(string fi, string fo) {
if (fi != "" && (!kami_loc || fi == kami_fi)) {
freopen(fi.c_str(), "r", stdin);
}
if (fo != "" && (!kami_loc || fo == kami_fo)) {
freopen(fo.c_str(), "w", stdout);
}
}
void set_up() {
if (kami_loc) {
file_io(kami_fi, kami_fo);
}
ios_base::sync_with_stdio(0);
cin.tie(0);
}
void just_do_it();
void just_exec_it() {
if (kami_loc) {
auto pstart = chrono::steady_clock::now();
just_do_it();
auto pend = chrono::steady_clock::now();
long long ptime = chrono::duration_cast<chrono::milliseconds>(pend - pstart).count();
string bar(50, '=');
cout << '\n' << bar << '\n';
cout << "Time: " << ptime << " ms" << '\n';
}
else {
just_do_it();
}
}
int main() {
set_up();
just_exec_it();
return 0;
}
// END BOILERPLATE CODE
// BEGIN MAIN CODE
struct range {
int root = 0;
int pos = 0;
int lt = 0;
int rt = 0;
range() {
}
range(int _root, int _pos, int _lt, int _rt) {
root = _root;
pos = _pos;
lt = _lt;
rt = _rt;
}
};
struct tree {
vector<long long> tr;
vector<long long> lz;
int n = 0;
tree() {
}
tree(int _n) {
n = _n;
tr.resize(n << 2);
lz.resize(n << 2);
}
void push(int cc) {
tr[cc << 1] += lz[cc];
lz[cc << 1] += lz[cc];
tr[cc << 1 | 1] += lz[cc];
lz[cc << 1 | 1] += lz[cc];
lz[cc] = 0;
}
void update(int cc, int lt, int rt, int ql, int qr, long long pp) {
if (lt == ql && rt == qr) {
tr[cc] += pp;
lz[cc] += pp;
return;
}
push(cc);
int mt = (lt + rt) / 2;
if (qr <= mt) {
update(cc << 1, lt, mt, ql, qr, pp);
}
else if (ql >= mt + 1) {
update(cc << 1 | 1, mt + 1, rt, ql, qr, pp);
}
else {
update(cc << 1, lt, mt, ql, mt, pp);
update(cc << 1 | 1, mt + 1, rt, mt + 1, qr, pp);
}
tr[cc] = max(tr[cc << 1], tr[cc << 1 | 1]);
}
};
const int ms = 1e5 + 20;
bool f[ms];
int sz[ms];
long long W[ms];
vector<pair<int, int>> adj[ms];
int pt[ms][2];
int tz;
multiset<long long, greater<long long>> S;
multiset<long long, greater<long long>> best[ms];
vector<range> R[ms];
vector<tree> T[ms];
void dfs1(int u, int pr) {
sz[u] = 1;
for (auto x: adj[u]) {
int v = x.first;
if (!f[v] && v != pr) {
dfs1(v, u);
sz[u] += sz[v];
}
}
}
int ctr(int u, int pr, int root) {
for (auto x: adj[u]) {
int v = x.first;
if (!f[v] && v != pr) {
if (sz[v] * 2 > sz[root]) {
return ctr(v, u, root);
}
}
}
return u;
}
void dfs2(int u, int pr, int root, int pos) {
pt[u][0] = ++tz;
sz[u] = 1;
for (auto x: adj[u]) {
int v = x.first;
int id = x.second;
if (!f[v] && v != pr) {
dfs2(v, u, root, pos);
R[id].emplace_back(root, pos, pt[v][0], pt[v][1]);
sz[u] += sz[v];
}
}
pt[u][1] = tz;
}
void build(int u) {
dfs1(u, -1);
u = ctr(u, -1, u);
f[u] = true;
int cnt = 0;
for (auto x: adj[u]) {
int v = x.first;
int id = x.second;
if (!f[v]) {
tz = 0;
dfs2(v, -1, u, cnt);
R[id].emplace_back(u, cnt, pt[v][0], pt[v][1]);
cnt++;
T[u].emplace_back(sz[v]);
best[u].insert(0);
}
}
for (auto x: adj[u]) {
int v = x.first;
if (!f[v]) {
build(v);
}
}
}
long long get(int u) {
long long res = 0;
auto it = best[u].begin();
if (it == best[u].end()) {
return res;
}
res += (*it);
it++;
if (it == best[u].end()) {
return res;
}
res += (*it);
return res;
}
void update(range r, long long pp) {
int root = r.root;
int pos = r.pos;
int lt = r.lt;
int rt = r.rt;
S.erase(S.find(get(root)));
tree &t = T[root][pos];
best[root].erase(best[root].find(t.tr[1]));
t.update(1, 1, t.n, lt, rt, pp);
best[root].insert(t.tr[1]);
S.insert(get(root));
}
void just_do_it() {
int n, q;
long long lim;
cin >> n >> q >> lim;
for (int i = 0; i < n; i++) {
S.insert(0);
}
for (int i = 0; i < n - 1; i++) {
int u, v;
cin >> u >> v >> W[i];
adj[u].emplace_back(v, i);
adj[v].emplace_back(u, i);
}
build(1);
for (int i = 0; i < n - 1; i++) {
for (auto r: R[i]) {
update(r, W[i]);
}
}
long long res = 0;
for (int i = 0; i < q; i++) {
int id;
long long w;
cin >> id >> w;
id = (res + id) % (n - 1);
w = (res + w) % lim;
for (auto r: R[id]) {
update(r, w - W[id]);
}
W[id] = w;
res = *S.begin();
cout << res << '\n';
}
}
// END MAIN CODE
Compilation message
diameter.cpp: In function 'void file_io(std::string, std::string)':
diameter.cpp:30:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | freopen(fi.c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
diameter.cpp:33:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | freopen(fo.c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
7 ms |
11988 KB |
Output is correct |
3 |
Correct |
8 ms |
12084 KB |
Output is correct |
4 |
Correct |
8 ms |
11996 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
9 ms |
12064 KB |
Output is correct |
7 |
Correct |
7 ms |
12016 KB |
Output is correct |
8 |
Correct |
7 ms |
12084 KB |
Output is correct |
9 |
Correct |
6 ms |
12084 KB |
Output is correct |
10 |
Correct |
6 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
12076 KB |
Output is correct |
12 |
Correct |
6 ms |
12116 KB |
Output is correct |
13 |
Correct |
7 ms |
12076 KB |
Output is correct |
14 |
Correct |
6 ms |
12116 KB |
Output is correct |
15 |
Correct |
7 ms |
12076 KB |
Output is correct |
16 |
Correct |
8 ms |
12032 KB |
Output is correct |
17 |
Correct |
8 ms |
12116 KB |
Output is correct |
18 |
Correct |
7 ms |
12076 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
7 ms |
11988 KB |
Output is correct |
3 |
Correct |
8 ms |
12084 KB |
Output is correct |
4 |
Correct |
8 ms |
11996 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
9 ms |
12064 KB |
Output is correct |
7 |
Correct |
7 ms |
12016 KB |
Output is correct |
8 |
Correct |
7 ms |
12084 KB |
Output is correct |
9 |
Correct |
6 ms |
12084 KB |
Output is correct |
10 |
Correct |
6 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
12076 KB |
Output is correct |
12 |
Correct |
6 ms |
12116 KB |
Output is correct |
13 |
Correct |
7 ms |
12076 KB |
Output is correct |
14 |
Correct |
6 ms |
12116 KB |
Output is correct |
15 |
Correct |
7 ms |
12076 KB |
Output is correct |
16 |
Correct |
8 ms |
12032 KB |
Output is correct |
17 |
Correct |
8 ms |
12116 KB |
Output is correct |
18 |
Correct |
7 ms |
12076 KB |
Output is correct |
19 |
Correct |
18 ms |
12820 KB |
Output is correct |
20 |
Correct |
19 ms |
12860 KB |
Output is correct |
21 |
Correct |
21 ms |
12988 KB |
Output is correct |
22 |
Correct |
23 ms |
13116 KB |
Output is correct |
23 |
Correct |
40 ms |
15956 KB |
Output is correct |
24 |
Correct |
48 ms |
16852 KB |
Output is correct |
25 |
Correct |
55 ms |
17484 KB |
Output is correct |
26 |
Correct |
62 ms |
18404 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
6 ms |
11988 KB |
Output is correct |
3 |
Correct |
7 ms |
12092 KB |
Output is correct |
4 |
Correct |
14 ms |
12244 KB |
Output is correct |
5 |
Correct |
44 ms |
13208 KB |
Output is correct |
6 |
Correct |
6 ms |
11988 KB |
Output is correct |
7 |
Correct |
7 ms |
12244 KB |
Output is correct |
8 |
Correct |
7 ms |
12244 KB |
Output is correct |
9 |
Correct |
8 ms |
12292 KB |
Output is correct |
10 |
Correct |
16 ms |
12504 KB |
Output is correct |
11 |
Correct |
53 ms |
13660 KB |
Output is correct |
12 |
Correct |
12 ms |
13780 KB |
Output is correct |
13 |
Correct |
12 ms |
13784 KB |
Output is correct |
14 |
Correct |
13 ms |
13808 KB |
Output is correct |
15 |
Correct |
23 ms |
14096 KB |
Output is correct |
16 |
Correct |
69 ms |
15312 KB |
Output is correct |
17 |
Correct |
159 ms |
46640 KB |
Output is correct |
18 |
Correct |
163 ms |
46660 KB |
Output is correct |
19 |
Correct |
160 ms |
46680 KB |
Output is correct |
20 |
Correct |
187 ms |
46868 KB |
Output is correct |
21 |
Correct |
351 ms |
48252 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
12884 KB |
Output is correct |
2 |
Correct |
24 ms |
13028 KB |
Output is correct |
3 |
Correct |
87 ms |
13588 KB |
Output is correct |
4 |
Correct |
158 ms |
14200 KB |
Output is correct |
5 |
Correct |
59 ms |
23812 KB |
Output is correct |
6 |
Correct |
86 ms |
23896 KB |
Output is correct |
7 |
Correct |
199 ms |
24548 KB |
Output is correct |
8 |
Correct |
339 ms |
25512 KB |
Output is correct |
9 |
Correct |
368 ms |
78768 KB |
Output is correct |
10 |
Correct |
416 ms |
78924 KB |
Output is correct |
11 |
Correct |
618 ms |
79588 KB |
Output is correct |
12 |
Correct |
868 ms |
80380 KB |
Output is correct |
13 |
Correct |
843 ms |
151856 KB |
Output is correct |
14 |
Correct |
876 ms |
151980 KB |
Output is correct |
15 |
Correct |
1226 ms |
152668 KB |
Output is correct |
16 |
Correct |
1462 ms |
153516 KB |
Output is correct |
17 |
Correct |
2309 ms |
153512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2346 ms |
129076 KB |
Output is correct |
2 |
Correct |
2391 ms |
132604 KB |
Output is correct |
3 |
Correct |
2362 ms |
131820 KB |
Output is correct |
4 |
Correct |
2375 ms |
132136 KB |
Output is correct |
5 |
Correct |
2222 ms |
126312 KB |
Output is correct |
6 |
Correct |
1621 ms |
93376 KB |
Output is correct |
7 |
Correct |
3294 ms |
157564 KB |
Output is correct |
8 |
Correct |
3231 ms |
157320 KB |
Output is correct |
9 |
Correct |
3216 ms |
157372 KB |
Output is correct |
10 |
Correct |
3271 ms |
156900 KB |
Output is correct |
11 |
Correct |
3030 ms |
149480 KB |
Output is correct |
12 |
Correct |
2227 ms |
106476 KB |
Output is correct |
13 |
Correct |
3321 ms |
168956 KB |
Output is correct |
14 |
Correct |
3275 ms |
168888 KB |
Output is correct |
15 |
Correct |
3279 ms |
168884 KB |
Output is correct |
16 |
Correct |
3273 ms |
168208 KB |
Output is correct |
17 |
Correct |
3079 ms |
159344 KB |
Output is correct |
18 |
Correct |
2119 ms |
110136 KB |
Output is correct |
19 |
Correct |
3260 ms |
168716 KB |
Output is correct |
20 |
Correct |
3320 ms |
168828 KB |
Output is correct |
21 |
Correct |
3268 ms |
168776 KB |
Output is correct |
22 |
Correct |
3257 ms |
168196 KB |
Output is correct |
23 |
Correct |
3060 ms |
159484 KB |
Output is correct |
24 |
Correct |
2122 ms |
110204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
11988 KB |
Output is correct |
2 |
Correct |
7 ms |
11988 KB |
Output is correct |
3 |
Correct |
8 ms |
12084 KB |
Output is correct |
4 |
Correct |
8 ms |
11996 KB |
Output is correct |
5 |
Correct |
7 ms |
11988 KB |
Output is correct |
6 |
Correct |
9 ms |
12064 KB |
Output is correct |
7 |
Correct |
7 ms |
12016 KB |
Output is correct |
8 |
Correct |
7 ms |
12084 KB |
Output is correct |
9 |
Correct |
6 ms |
12084 KB |
Output is correct |
10 |
Correct |
6 ms |
12116 KB |
Output is correct |
11 |
Correct |
7 ms |
12076 KB |
Output is correct |
12 |
Correct |
6 ms |
12116 KB |
Output is correct |
13 |
Correct |
7 ms |
12076 KB |
Output is correct |
14 |
Correct |
6 ms |
12116 KB |
Output is correct |
15 |
Correct |
7 ms |
12076 KB |
Output is correct |
16 |
Correct |
8 ms |
12032 KB |
Output is correct |
17 |
Correct |
8 ms |
12116 KB |
Output is correct |
18 |
Correct |
7 ms |
12076 KB |
Output is correct |
19 |
Correct |
18 ms |
12820 KB |
Output is correct |
20 |
Correct |
19 ms |
12860 KB |
Output is correct |
21 |
Correct |
21 ms |
12988 KB |
Output is correct |
22 |
Correct |
23 ms |
13116 KB |
Output is correct |
23 |
Correct |
40 ms |
15956 KB |
Output is correct |
24 |
Correct |
48 ms |
16852 KB |
Output is correct |
25 |
Correct |
55 ms |
17484 KB |
Output is correct |
26 |
Correct |
62 ms |
18404 KB |
Output is correct |
27 |
Correct |
7 ms |
11988 KB |
Output is correct |
28 |
Correct |
6 ms |
11988 KB |
Output is correct |
29 |
Correct |
7 ms |
12092 KB |
Output is correct |
30 |
Correct |
14 ms |
12244 KB |
Output is correct |
31 |
Correct |
44 ms |
13208 KB |
Output is correct |
32 |
Correct |
6 ms |
11988 KB |
Output is correct |
33 |
Correct |
7 ms |
12244 KB |
Output is correct |
34 |
Correct |
7 ms |
12244 KB |
Output is correct |
35 |
Correct |
8 ms |
12292 KB |
Output is correct |
36 |
Correct |
16 ms |
12504 KB |
Output is correct |
37 |
Correct |
53 ms |
13660 KB |
Output is correct |
38 |
Correct |
12 ms |
13780 KB |
Output is correct |
39 |
Correct |
12 ms |
13784 KB |
Output is correct |
40 |
Correct |
13 ms |
13808 KB |
Output is correct |
41 |
Correct |
23 ms |
14096 KB |
Output is correct |
42 |
Correct |
69 ms |
15312 KB |
Output is correct |
43 |
Correct |
159 ms |
46640 KB |
Output is correct |
44 |
Correct |
163 ms |
46660 KB |
Output is correct |
45 |
Correct |
160 ms |
46680 KB |
Output is correct |
46 |
Correct |
187 ms |
46868 KB |
Output is correct |
47 |
Correct |
351 ms |
48252 KB |
Output is correct |
48 |
Correct |
11 ms |
12884 KB |
Output is correct |
49 |
Correct |
24 ms |
13028 KB |
Output is correct |
50 |
Correct |
87 ms |
13588 KB |
Output is correct |
51 |
Correct |
158 ms |
14200 KB |
Output is correct |
52 |
Correct |
59 ms |
23812 KB |
Output is correct |
53 |
Correct |
86 ms |
23896 KB |
Output is correct |
54 |
Correct |
199 ms |
24548 KB |
Output is correct |
55 |
Correct |
339 ms |
25512 KB |
Output is correct |
56 |
Correct |
368 ms |
78768 KB |
Output is correct |
57 |
Correct |
416 ms |
78924 KB |
Output is correct |
58 |
Correct |
618 ms |
79588 KB |
Output is correct |
59 |
Correct |
868 ms |
80380 KB |
Output is correct |
60 |
Correct |
843 ms |
151856 KB |
Output is correct |
61 |
Correct |
876 ms |
151980 KB |
Output is correct |
62 |
Correct |
1226 ms |
152668 KB |
Output is correct |
63 |
Correct |
1462 ms |
153516 KB |
Output is correct |
64 |
Correct |
2309 ms |
153512 KB |
Output is correct |
65 |
Correct |
2346 ms |
129076 KB |
Output is correct |
66 |
Correct |
2391 ms |
132604 KB |
Output is correct |
67 |
Correct |
2362 ms |
131820 KB |
Output is correct |
68 |
Correct |
2375 ms |
132136 KB |
Output is correct |
69 |
Correct |
2222 ms |
126312 KB |
Output is correct |
70 |
Correct |
1621 ms |
93376 KB |
Output is correct |
71 |
Correct |
3294 ms |
157564 KB |
Output is correct |
72 |
Correct |
3231 ms |
157320 KB |
Output is correct |
73 |
Correct |
3216 ms |
157372 KB |
Output is correct |
74 |
Correct |
3271 ms |
156900 KB |
Output is correct |
75 |
Correct |
3030 ms |
149480 KB |
Output is correct |
76 |
Correct |
2227 ms |
106476 KB |
Output is correct |
77 |
Correct |
3321 ms |
168956 KB |
Output is correct |
78 |
Correct |
3275 ms |
168888 KB |
Output is correct |
79 |
Correct |
3279 ms |
168884 KB |
Output is correct |
80 |
Correct |
3273 ms |
168208 KB |
Output is correct |
81 |
Correct |
3079 ms |
159344 KB |
Output is correct |
82 |
Correct |
2119 ms |
110136 KB |
Output is correct |
83 |
Correct |
3260 ms |
168716 KB |
Output is correct |
84 |
Correct |
3320 ms |
168828 KB |
Output is correct |
85 |
Correct |
3268 ms |
168776 KB |
Output is correct |
86 |
Correct |
3257 ms |
168196 KB |
Output is correct |
87 |
Correct |
3060 ms |
159484 KB |
Output is correct |
88 |
Correct |
2122 ms |
110204 KB |
Output is correct |
89 |
Correct |
2358 ms |
129740 KB |
Output is correct |
90 |
Correct |
2776 ms |
140408 KB |
Output is correct |
91 |
Correct |
3047 ms |
152792 KB |
Output is correct |
92 |
Correct |
3170 ms |
155908 KB |
Output is correct |
93 |
Correct |
3317 ms |
161352 KB |
Output is correct |
94 |
Correct |
3351 ms |
162152 KB |
Output is correct |
95 |
Correct |
3233 ms |
166064 KB |
Output is correct |
96 |
Correct |
3246 ms |
164708 KB |
Output is correct |
97 |
Correct |
3272 ms |
165776 KB |
Output is correct |
98 |
Correct |
3198 ms |
168088 KB |
Output is correct |
99 |
Correct |
3232 ms |
165480 KB |
Output is correct |
100 |
Correct |
3198 ms |
165488 KB |
Output is correct |